25652921 has 18 divisors (see below), whose sum is σ = 30841902. Its totient is φ = 21262080.

The previous prime is 25652899. The next prime is 25652923. The reversal of 25652921 is 12925652.

It can be written as a sum of positive squares in 3 ways, for example, as 6817321 + 18835600 = 2611^2 + 4340^2 .

It is not a de Polignac number, because 25652921 - 2¹⁴ = 25636537 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25652923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 226961 + ... + 227073.

It is an arithmetic number, because the mean of its divisors is an integer number (1713439).

Almost surely, 2^25652921 is an apocalyptic number.

It is an amenable number.

25652921 is a deficient number, since it is larger than the sum of its proper divisors (5188981).

25652921 is an equidigital number, since it uses as much as digits as its factorization.

25652921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 161 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 25652921 is about 5064.8712718094. The cubic root of 25652921 is about 294.9254661840.

The spelling of 25652921 in words is "twenty-five million, six hundred fifty-two thousand, nine hundred twenty-one".