1481067781 has 4 divisors (see below), whose sum is σ = 1481365600. Its totient is φ = 1480769964.

The previous prime is 1481067767. The next prime is 1481067817. The reversal of 1481067781 is 1877601841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1877601841 = 233 ⋅8058377.

It is a cyclic number.

It is not a de Polignac number, because 1481067781 - 2²¹ = 1478970629 is a prime.

It is a super-2 number, since 2×1481067781² = 4387123543832527922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481067701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141321 + ... + 151438.

It is an arithmetic number, because the mean of its divisors is an integer number (370341400).

Almost surely, 2^1481067781 is an apocalyptic number.

It is an amenable number.

1481067781 is a deficient number, since it is larger than the sum of its proper divisors (297819).

1481067781 is an equidigital number, since it uses as much as digits as its factorization.

1481067781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297818.

The product of its (nonzero) digits is 75264, while the sum is 43.

The square root of 1481067781 is about 38484.6434438465. The cubic root of 1481067781 is about 1139.8778418915.

The spelling of 1481067781 in words is "one billion, four hundred eighty-one million, sixty-seven thousand, seven hundred eighty-one".