25500642 has 8 divisors (see below), whose sum is σ = 51001296. Its totient is φ = 8500212.

The previous prime is 25500617. The next prime is 25500653. The reversal of 25500642 is 24600552.

It is a sphenic number, since it is the product of 3 distinct primes.

25500642 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125048 + ... + 2125059.

It is an arithmetic number, because the mean of its divisors is an integer number (6375162).

Almost surely, 2^25500642 is an apocalyptic number.

25500642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25500642 is a wasteful number, since it uses less digits than its factorization.

25500642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250112.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25500642 is about 5049.8160362532. The cubic root of 25500642 is about 294.3407359563.

The spelling of 25500642 in words is "twenty-five million, five hundred thousand, six hundred forty-two".