25492387 has 4 divisors (see below), whose sum is σ = 25613416. Its totient is φ = 25371360.

The previous prime is 25492381. The next prime is 25492427. The reversal of 25492387 is 78329452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25492387 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25492381) 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, 60198 + ... + 60619.

It is an arithmetic number, because the mean of its divisors is an integer number (6403354).

Almost surely, 2^25492387 is an apocalyptic number.

25492387 is a deficient number, since it is larger than the sum of its proper divisors (121029).

25492387 is a wasteful number, since it uses less digits than its factorization.

25492387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121028.

The product of its digits is 120960, while the sum is 40.

The square root of 25492387 is about 5048.9986135867. The cubic root of 25492387 is about 294.3089714618.

The spelling of 25492387 in words is "twenty-five million, four hundred ninety-two thousand, three hundred eighty-seven".