21592925 has 12 divisors (see below), whose sum is σ = 26837940. Its totient is φ = 17233920.

The previous prime is 21592897. The next prime is 21592927. The reversal of 21592925 is 52929512.

It can be written as a sum of positive squares in 6 ways, for example, as 12020089 + 9572836 = 3467^2 + 3094^2 .

It is not a de Polignac number, because 21592925 - 2¹² = 21588829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21592927) 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, 14621 + ... + 16029.

It is an arithmetic number, because the mean of its divisors is an integer number (2236495).

Almost surely, 2^21592925 is an apocalyptic number.

21592925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21592925 is a deficient number, since it is larger than the sum of its proper divisors (5245015).

21592925 is a wasteful number, since it uses less digits than its factorization.

21592925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032 (or 2027 counting only the distinct ones).

The product of its digits is 16200, while the sum is 35.

The square root of 21592925 is about 4646.8188043004. The cubic root of 21592925 is about 278.4649199917.

The spelling of 21592925 in words is "twenty-one million, five hundred ninety-two thousand, nine hundred twenty-five".