25642542 has 16 divisors (see below), whose sum is σ = 52376832. Its totient is φ = 8365560.

The previous prime is 25642541. The next prime is 25642567. The reversal of 25642542 is 24524652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45184 + ... + 45747.

It is an arithmetic number, because the mean of its divisors is an integer number (3273552).

Almost surely, 2^25642542 is an apocalyptic number.

25642542 is an abundant number, since it is smaller than the sum of its proper divisors (26734290).

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

25642542 is a wasteful number, since it uses less digits than its factorization.

25642542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90983.

The product of its digits is 19200, while the sum is 30.

The square root of 25642542 is about 5063.8465616565. The cubic root of 25642542 is about 294.8856858625.

The spelling of 25642542 in words is "twenty-five million, six hundred forty-two thousand, five hundred forty-two".