1464568381 has 4 divisors (see below), whose sum is σ = 1464649564. Its totient is φ = 1464487200.

The previous prime is 1464568351. The next prime is 1464568397. The reversal of 1464568381 is 1838654641.

1464568381 is a nontrivial binomial coefficient, being equal to C(54122, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1838654641 = 53 ⋅34691597.

It can be written as a sum of positive squares in 2 ways, for example, as 47045881 + 1417522500 = 6859^2 + 37650^2 .

It is a 3-Lehmer number, since φ(1464568381) divides (1464568381-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1464568381 - 2²⁹ = 927697469 is a prime.

It is a super-2 number, since 2×1464568381² = 4289921085249922322, which contains 22 as substring.

It is a deceptive number, since it divides R_1464568380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1464568351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 54121.

It is an arithmetic number, because the mean of its divisors is an integer number (366162391).

It is a Poulet number, since it divides 2^1464568380-1.

Almost surely, 2^1464568381 is an apocalyptic number.

1464568381 is the 54121-st triangular number and also the 27061-st hexagonal number.

1464568381 is the 18041-st centered nonagonal number.

It is an amenable number.

1464568381 is a deficient number, since it is larger than the sum of its proper divisors (81183).

1464568381 is an equidigital number, since it uses as much as digits as its factorization.

1464568381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81182.

The product of its digits is 552960, while the sum is 46.

The square root of 1464568381 is about 38269.6796563546. The cubic root of 1464568381 is about 1135.6292010924.

The spelling of 1464568381 in words is "one billion, four hundred sixty-four million, five hundred sixty-eight thousand, three hundred eighty-one".