1492665881 has 6 divisors (see below), whose sum is σ = 1736366490. Its totient is φ = 1279427856.

The previous prime is 1492665869. The next prime is 1492665893. The reversal of 1492665881 is 1885662941.

It is an interprime number because it is at equal distance from previous prime (1492665869) and next prime (1492665893).

It can be written as a sum of positive squares in only one way, i.e., 900960256 + 591705625 = 30016^2 + 24325^2 .

It is not a de Polignac number, because 1492665881 - 2²² = 1488471577 is a prime.

It is a super-2 number, since 2×1492665881² = 4456102864603012322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1492665781) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15231236 + ... + 15231333.

It is an arithmetic number, because the mean of its divisors is an integer number (289394415).

Almost surely, 2^1492665881 is an apocalyptic number.

It is an amenable number.

1492665881 is a deficient number, since it is larger than the sum of its proper divisors (243700609).

1492665881 is an equidigital number, since it uses as much as digits as its factorization.

1492665881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30462583 (or 30462576 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

The square root of 1492665881 is about 38635.0343729626. The cubic root of 1492665881 is about 1142.8455335004.

The spelling of 1492665881 in words is "one billion, four hundred ninety-two million, six hundred sixty-five thousand, eight hundred eighty-one".