25641315 has 24 divisors (see below), whose sum is σ = 50794848. Its totient is φ = 11721600.

The previous prime is 25641313. The next prime is 25641383. The reversal of 25641315 is 51314652.

25641315 is a `hidden beast` number, since 2 + 5 + 641 + 3 + 15 = 666.

It is not a de Polignac number, because 25641315 - 2¹ = 25641313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25641313) 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 23 ways as a sum of consecutive naturals, for example, 40386 + ... + 41015.

It is an arithmetic number, because the mean of its divisors is an integer number (2116452).

Almost surely, 2^25641315 is an apocalyptic number.

25641315 is a deficient number, since it is larger than the sum of its proper divisors (25153533).

25641315 is a wasteful number, since it uses less digits than its factorization.

25641315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81419 (or 81416 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 25641315 is about 5063.7254072471. The cubic root of 25641315 is about 294.8809823441.

Adding to 25641315 its reverse (51314652), we get a palindrome (76955967).

The spelling of 25641315 in words is "twenty-five million, six hundred forty-one thousand, three hundred fifteen".