25882021 has 6 divisors (see below), whose sum is σ = 28448966. Its totient is φ = 23529000.

The previous prime is 25882019. The next prime is 25882037. The reversal of 25882021 is 12028852.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 1920996 = 4895^2 + 1386^2 .

It is not a de Polignac number, because 25882021 - 2¹ = 25882019 is a prime.

It is a super-2 number, since 2×25882021² = 1339758022088882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25882081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106830 + ... + 107071.

Almost surely, 2^25882021 is an apocalyptic number.

It is an amenable number.

25882021 is a deficient number, since it is larger than the sum of its proper divisors (2566945).

25882021 is a wasteful number, since it uses less digits than its factorization.

25882021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213923 (or 213912 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 25882021 is about 5087.4375671845. The cubic root of 25882021 is about 295.8008346411.

The spelling of 25882021 in words is "twenty-five million, eight hundred eighty-two thousand, twenty-one".