25464781 has 4 divisors (see below), whose sum is σ = 25787200. Its totient is φ = 25142364.

The previous prime is 25464767. The next prime is 25464787. The reversal of 25464781 is 18746452.

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.

It is a cyclic number.

It is not a de Polignac number, because 25464781 - 2⁷ = 25464653 is a prime.

It is a super-2 number, since 2×25464781² = 1296910142755922, which contains 22 as substring.

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 25464781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464787) 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, 161091 + ... + 161248.

It is an arithmetic number, because the mean of its divisors is an integer number (6446800).

Almost surely, 2^25464781 is an apocalyptic number.

It is an amenable number.

25464781 is a deficient number, since it is larger than the sum of its proper divisors (322419).

25464781 is an equidigital number, since it uses as much as digits as its factorization.

25464781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322418.

The product of its digits is 53760, while the sum is 37.

The square root of 25464781 is about 5046.2640636415. The cubic root of 25464781 is about 294.2026962301.

The spelling of 25464781 in words is "twenty-five million, four hundred sixty-four thousand, seven hundred eighty-one".