25395921 has 6 divisors (see below), whose sum is σ = 36683010. Its totient is φ = 16930608.

The previous prime is 25395911. The next prime is 25395941. The reversal of 25395921 is 12959352.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 9235521 = 4020^2 + 3039^2 .

It is not a de Polignac number, because 25395921 - 2¹⁴ = 25379537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25395911) 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, 1410876 + ... + 1410893.

It is an arithmetic number, because the mean of its divisors is an integer number (6113835).

Almost surely, 2^25395921 is an apocalyptic number.

It is an amenable number.

25395921 is a deficient number, since it is larger than the sum of its proper divisors (11287089).

25395921 is a wasteful number, since it uses less digits than its factorization.

25395921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821775 (or 2821772 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 25395921 is about 5039.4365756501. The cubic root of 25395921 is about 293.9372696928.

The spelling of 25395921 in words is "twenty-five million, three hundred ninety-five thousand, nine hundred twenty-one".