25413257 has 4 divisors (see below), whose sum is σ = 25458960. Its totient is φ = 25367556.

The previous prime is 25413253. The next prime is 25413263. The reversal of 25413257 is 75231452.

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 25413257 - 2² = 25413253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25413253) 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, 22007 + ... + 23132.

It is an arithmetic number, because the mean of its divisors is an integer number (6364740).

Almost surely, 2^25413257 is an apocalyptic number.

It is an amenable number.

25413257 is a deficient number, since it is larger than the sum of its proper divisors (45703).

25413257 is an equidigital number, since it uses as much as digits as its factorization.

25413257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45702.

The product of its digits is 8400, while the sum is 29.

The square root of 25413257 is about 5041.1563157672. The cubic root of 25413257 is about 294.0041378781.

The spelling of 25413257 in words is "twenty-five million, four hundred thirteen thousand, two hundred fifty-seven".