25542623 has 4 divisors (see below), whose sum is σ = 25714200. Its totient is φ = 25371048.

The previous prime is 25542613. The next prime is 25542641. The reversal of 25542623 is 32624552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25542623 - 2⁴ = 25542607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25542613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85565 + ... + 85862.

It is an arithmetic number, because the mean of its divisors is an integer number (6428550).

Almost surely, 2^25542623 is an apocalyptic number.

25542623 is a deficient number, since it is larger than the sum of its proper divisors (171577).

25542623 is a wasteful number, since it uses less digits than its factorization.

25542623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171576.

The product of its digits is 14400, while the sum is 29.

The square root of 25542623 is about 5053.9710129758. The cubic root of 25542623 is about 294.5021690657.

The spelling of 25542623 in words is "twenty-five million, five hundred forty-two thousand, six hundred twenty-three".