25051387 has 8 divisors (see below), whose sum is σ = 26622000. Its totient is φ = 23573152.

The previous prime is 25051373. The next prime is 25051417. The reversal of 25051387 is 78315052.

It is a de Polignac number, because none of the positive numbers 2^k-25051387 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25051357) 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, 2364 + ... + 7462.

It is an arithmetic number, because the mean of its divisors is an integer number (3327750).

Almost surely, 2^25051387 is an apocalyptic number.

25051387 is a deficient number, since it is larger than the sum of its proper divisors (1570613).

25051387 is an frugal number, since it uses more digits than its factorization.

25051387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150 (or 5116 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 25051387 is about 5005.1360620866. The cubic root of 25051387 is about 292.6019787108.

The spelling of 25051387 in words is "twenty-five million, fifty-one thousand, three hundred eighty-seven".