25020081 has 12 divisors (see below), whose sum is σ = 36822708. Its totient is φ = 16365024.

The previous prime is 25020059. The next prime is 25020097. The reversal of 25020081 is 18002052.

It can be written as a sum of positive squares in 2 ways, for example, as 14130081 + 10890000 = 3759^2 + 3300^2 .

It is not a de Polignac number, because 25020081 - 2¹⁴ = 25003697 is a prime.

It is a super-2 number, since 2×25020081² = 1252008906493122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25020001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25750 + ... + 26703.

It is an arithmetic number, because the mean of its divisors is an integer number (3068559).

Almost surely, 2^25020081 is an apocalyptic number.

It is an amenable number.

25020081 is a deficient number, since it is larger than the sum of its proper divisors (11802627).

25020081 is a wasteful number, since it uses less digits than its factorization.

25020081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52512 (or 52509 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 25020081 is about 5002.0076969153. The cubic root of 25020081 is about 292.4800424691.

The spelling of 25020081 in words is "twenty-five million, twenty thousand, eighty-one".