15490491 has 16 divisors (see below), whose sum is σ = 21830400. Its totient is φ = 9743328.

The previous prime is 15490459. The next prime is 15490507. The reversal of 15490491 is 19409451.

It is not a de Polignac number, because 15490491 - 2⁵ = 15490459 is a prime.

It is a super-2 number, since 2×15490491² = 479910622842162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15490691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20085 + ... + 20841.

It is an arithmetic number, because the mean of its divisors is an integer number (1364400).

Almost surely, 2^15490491 is an apocalyptic number.

15490491 is a deficient number, since it is larger than the sum of its proper divisors (6339909).

15490491 is a wasteful number, since it uses less digits than its factorization.

15490491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 15490491 is about 3935.7961075239. The cubic root of 15490491 is about 249.2805502208.

The spelling of 15490491 in words is "fifteen million, four hundred ninety thousand, four hundred ninety-one".