25642825 has 12 divisors (see below), whose sum is σ = 34243468. Its totient is φ = 18936000.

The previous prime is 25642819. The next prime is 25642829. The reversal of 25642825 is 52824652.

25642825 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 6 ways, for example, as 4372281 + 21270544 = 2091^2 + 4612^2 .

It is not a de Polignac number, because 25642825 - 2⁹ = 25642313 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25642829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39126 + ... + 39775.

Almost surely, 2^25642825 is an apocalyptic number.

25642825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25642825 is a deficient number, since it is larger than the sum of its proper divisors (8600643).

25642825 is a wasteful number, since it uses less digits than its factorization.

25642825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78924 (or 78919 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 25642825 is about 5063.8745047641. The cubic root of 25642825 is about 294.8867706788.

The spelling of 25642825 in words is "twenty-five million, six hundred forty-two thousand, eight hundred twenty-five".