25912321 has 8 divisors (see below), whose sum is σ = 26680104. Its totient is φ = 25148160.

The previous prime is 25912319. The next prime is 25912343. The reversal of 25912321 is 12321952.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16524225 + 9388096 = 4065^2 + 3064^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25912321 - 2¹ = 25912319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25912021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21351 + ... + 22531.

It is an arithmetic number, because the mean of its divisors is an integer number (3335013).

Almost surely, 2^25912321 is an apocalyptic number.

It is an amenable number.

25912321 is a deficient number, since it is larger than the sum of its proper divisors (767783).

25912321 is a wasteful number, since it uses less digits than its factorization.

25912321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811.

The product of its digits is 1080, while the sum is 25.

The square root of 25912321 is about 5090.4146196553. The cubic root of 25912321 is about 295.9162206588.

The spelling of 25912321 in words is "twenty-five million, nine hundred twelve thousand, three hundred twenty-one".