25032321 has 20 divisors (see below), whose sum is σ = 38268912. Its totient is φ = 16297848.

The previous prime is 25032277. The next prime is 25032353. The reversal of 25032321 is 12323052.

It is not a de Polignac number, because 25032321 - 2¹⁴ = 25015937 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 25032294 and 25032303.

It is not an unprimeable number, because it can be changed into a prime (25032421) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 111 + ... + 7076.

Almost surely, 2^25032321 is an apocalyptic number.

It is an amenable number.

25032321 is a deficient number, since it is larger than the sum of its proper divisors (13236591).

25032321 is an equidigital number, since it uses as much as digits as its factorization.

25032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242 (or 7233 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 25032321 is about 5003.2310560277. The cubic root of 25032321 is about 292.5277291266.

Adding to 25032321 its reverse (12323052), we get a palindrome (37355373).

The spelling of 25032321 in words is "twenty-five million, thirty-two thousand, three hundred twenty-one".