1402451261 has 4 divisors (see below), whose sum is σ = 1484948412. Its totient is φ = 1319954112.

The previous prime is 1402451209. The next prime is 1402451269. The reversal of 1402451261 is 1621542041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1621542041 = 7 ⋅231648863.

It can be written as a sum of positive squares in 2 ways, for example, as 449185636 + 953265625 = 21194^2 + 30875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402451261 - 2¹⁴ = 1402434877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1402451261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402451269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41248550 + ... + 41248583.

It is an arithmetic number, because the mean of its divisors is an integer number (371237103).

Almost surely, 2^1402451261 is an apocalyptic number.

It is an amenable number.

1402451261 is a deficient number, since it is larger than the sum of its proper divisors (82497151).

1402451261 is an equidigital number, since it uses as much as digits as its factorization.

1402451261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82497150.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1402451261 is about 37449.3158949533. The cubic root of 1402451261 is about 1119.3414658173.

The spelling of 1402451261 in words is "one billion, four hundred two million, four hundred fifty-one thousand, two hundred sixty-one".