25918542 has 80 divisors (see below), whose sum is σ = 64724352. Its totient is φ = 7698240.

The previous prime is 25918517. The next prime is 25918553. The reversal of 25918542 is 24581952.

25918542 is a `hidden beast` number, since 25 + 91 + 8 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25918497 and 25918506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 65088 + ... + 65484.

Almost surely, 2^25918542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25918542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32362176).

25918542 is an abundant number, since it is smaller than the sum of its proper divisors (38805810).

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

25918542 is a wasteful number, since it uses less digits than its factorization.

25918542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 446 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 25918542 is about 5091.0256334063. The cubic root of 25918542 is about 295.9398998384.

The spelling of 25918542 in words is "twenty-five million, nine hundred eighteen thousand, five hundred forty-two".