25475021 has 16 divisors (see below), whose sum is σ = 30965760. Its totient is φ = 20637120.

The previous prime is 25475011. The next prime is 25475039. The reversal of 25475021 is 12057452.

It is a cyclic number.

It is not a de Polignac number, because 25475021 - 2⁶ = 25474957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25475011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076 + ... + 7218.

It is an arithmetic number, because the mean of its divisors is an integer number (1935360).

Almost surely, 2^25475021 is an apocalyptic number.

It is an amenable number.

25475021 is a deficient number, since it is larger than the sum of its proper divisors (5490739).

25475021 is a wasteful number, since it uses less digits than its factorization.

25475021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 25475021 is about 5047.2785736474. The cubic root of 25475021 is about 294.2421262685.

Subtracting from 25475021 its reverse (12057452), we obtain a square (13417569 = 3663²).

The spelling of 25475021 in words is "twenty-five million, four hundred seventy-five thousand, twenty-one".