25142881 has 8 divisors (see below), whose sum is σ = 27271944. Its totient is φ = 23086080.

The previous prime is 25142863. The next prime is 25142893. The reversal of 25142881 is 18824152.

It can be written as a sum of positive squares in 4 ways, for example, as 5958481 + 19184400 = 2441^2 + 4380^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25142881 - 2⁵ = 25142849 is a prime.

It is a super-2 number, since 2×25142881² = 1264328929960322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25142851) 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, 17340 + ... + 18733.

It is an arithmetic number, because the mean of its divisors is an integer number (3408993).

Almost surely, 2^25142881 is an apocalyptic number.

It is an amenable number.

25142881 is a deficient number, since it is larger than the sum of its proper divisors (2129063).

25142881 is a wasteful number, since it uses less digits than its factorization.

25142881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36131.

The product of its digits is 5120, while the sum is 31.

The square root of 25142881 is about 5014.2677431505. The cubic root of 25142881 is about 292.9577647268.

The spelling of 25142881 in words is "twenty-five million, one hundred forty-two thousand, eight hundred eighty-one".