25590642 has 96 divisors (see below), whose sum is σ = 66878784. Its totient is φ = 6451200.

The previous prime is 25590619. The next prime is 25590667. The reversal of 25590642 is 24609552.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132498 + ... + 132690.

It is an arithmetic number, because the mean of its divisors is an integer number (696654).

Almost surely, 2^25590642 is an apocalyptic number.

25590642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25590642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33439392).

25590642 is an abundant number, since it is smaller than the sum of its proper divisors (41288142).

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

25590642 is a wasteful number, since it uses less digits than its factorization.

25590642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 25590642 is about 5058.7194031691. The cubic root of 25590642 is about 294.6866038825.

The spelling of 25590642 in words is "twenty-five million, five hundred ninety thousand, six hundred forty-two".