25431542 has 4 divisors (see below), whose sum is σ = 38147316. Its totient is φ = 12715770.

The previous prime is 25431517. The next prime is 25431569. The reversal of 25431542 is 24513452.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6357884 + ... + 6357887.

It is an arithmetic number, because the mean of its divisors is an integer number (9536829).

Almost surely, 2^25431542 is an apocalyptic number.

25431542 is a deficient number, since it is larger than the sum of its proper divisors (12715774).

25431542 is a wasteful number, since it uses less digits than its factorization.

25431542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12715773.

The product of its digits is 4800, while the sum is 26.

The square root of 25431542 is about 5042.9695616769. The cubic root of 25431542 is about 294.0746335890.

Adding to 25431542 its reverse (24513452), we get a palindrome (49944994).

The spelling of 25431542 in words is "twenty-five million, four hundred thirty-one thousand, five hundred forty-two".