25002881 has 4 divisors (see below), whose sum is σ = 25015764. Its totient is φ = 24990000.

The previous prime is 25002847. The next prime is 25002889. The reversal of 25002881 is 18820052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2202256 + 22800625 = 1484^2 + 4775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25002881 is a prime.

It is a super-2 number, since 2×25002881² = 1250288116600322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25002881.

It is not an unprimeable number, because it can be changed into a prime (25002889) 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, 2870 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (6253941).

Almost surely, 2^25002881 is an apocalyptic number.

It is an amenable number.

25002881 is a deficient number, since it is larger than the sum of its proper divisors (12883).

25002881 is a wasteful number, since it uses less digits than its factorization.

25002881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12882.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 25002881 is about 5000.2880917003. The cubic root of 25002881 is about 292.4130055167.

The spelling of 25002881 in words is "twenty-five million, two thousand, eight hundred eighty-one".