25533642 has 16 divisors (see below), whose sum is σ = 51116832. Its totient is φ = 8502960.

The previous prime is 25533619. The next prime is 25533653. The reversal of 25533642 is 24633552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10917 + ... + 13047.

It is an arithmetic number, because the mean of its divisors is an integer number (3194802).

Almost surely, 2^25533642 is an apocalyptic number.

25533642 is an abundant number, since it is smaller than the sum of its proper divisors (25583190).

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

25533642 is a wasteful number, since it uses less digits than its factorization.

25533642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133.

The product of its digits is 21600, while the sum is 30.

The square root of 25533642 is about 5053.0824256091. The cubic root of 25533642 is about 294.4676485438.

The spelling of 25533642 in words is "twenty-five million, five hundred thirty-three thousand, six hundred forty-two".