25464397 has 4 divisors (see below), whose sum is σ = 29102176. Its totient is φ = 21826620.

The previous prime is 25464379. The next prime is 25464409. The reversal of 25464397 is 79346452.

It is a happy number.

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 25464397 - 2⁷ = 25464269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25464367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1818879 + ... + 1818892.

It is an arithmetic number, because the mean of its divisors is an integer number (7275544).

Almost surely, 2^25464397 is an apocalyptic number.

It is an amenable number.

25464397 is a deficient number, since it is larger than the sum of its proper divisors (3637779).

25464397 is an equidigital number, since it uses as much as digits as its factorization.

25464397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637778.

The product of its digits is 181440, while the sum is 40.

The square root of 25464397 is about 5046.2260155486. The cubic root of 25464397 is about 294.2012173980.

The spelling of 25464397 in words is "twenty-five million, four hundred sixty-four thousand, three hundred ninety-seven".