25087881 has 24 divisors (see below), whose sum is σ = 41401920. Its totient is φ = 13231296.

The previous prime is 25087879. The next prime is 25087883. The reversal of 25087881 is 18878052.

It is an interprime number because it is at equal distance from previous prime (25087879) and next prime (25087883).

It is not a de Polignac number, because 25087881 - 2¹ = 25087879 is a prime.

It is a super-2 number, since 2×25087881² = 1258803546140322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (25087883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15 + ... + 7083.

It is an arithmetic number, because the mean of its divisors is an integer number (1725080).

Almost surely, 2^25087881 is an apocalyptic number.

25087881 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25087881 is a deficient number, since it is larger than the sum of its proper divisors (16314039).

25087881 is a wasteful number, since it uses less digits than its factorization.

25087881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7105 (or 7092 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 25087881 is about 5008.7803904743. The cubic root of 25087881 is about 292.7439939425.

The spelling of 25087881 in words is "twenty-five million, eighty-seven thousand, eight hundred eighty-one".