25642845 has 16 divisors (see below), whose sum is σ = 45587520. Its totient is φ = 13676112.

The previous prime is 25642829. The next prime is 25642849. The reversal of 25642845 is 54824652.

It is a happy number.

25642845 is a `hidden beast` number, since 2 + 5 + 642 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 25642845 - 2⁴ = 25642829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94839 + ... + 95108.

It is an arithmetic number, because the mean of its divisors is an integer number (2849220).

Almost surely, 2^25642845 is an apocalyptic number.

It is an amenable number.

25642845 is a deficient number, since it is larger than the sum of its proper divisors (19944675).

25642845 is a wasteful number, since it uses less digits than its factorization.

25642845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189961 (or 189955 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 25642845 is about 5063.8764795362. The cubic root of 25642845 is about 294.8868473440.

The spelling of 25642845 in words is "twenty-five million, six hundred forty-two thousand, eight hundred forty-five".