25056257 has 4 divisors (see below), whose sum is σ = 25066836. Its totient is φ = 25045680.

The previous prime is 25056253. The next prime is 25056271. The reversal of 25056257 is 75265052.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15808576 + 9247681 = 3976^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 25056257 - 2² = 25056253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25056253) 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, 83 + ... + 7079.

It is an arithmetic number, because the mean of its divisors is an integer number (6266709).

Almost surely, 2^25056257 is an apocalyptic number.

It is an amenable number.

25056257 is a deficient number, since it is larger than the sum of its proper divisors (10579).

25056257 is an equidigital number, since it uses as much as digits as its factorization.

25056257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10578.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 25056257 is about 5005.6225387059. The cubic root of 25056257 is about 292.6209381309.

The spelling of 25056257 in words is "twenty-five million, fifty-six thousand, two hundred fifty-seven".