25329321 has 32 divisors (see below), whose sum is σ = 38787840. Its totient is φ = 16329600.

The previous prime is 25329313. The next prime is 25329323. The reversal of 25329321 is 12392352.

It is not a de Polignac number, because 25329321 - 2³ = 25329313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25329323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139851 + ... + 140031.

It is an arithmetic number, because the mean of its divisors is an integer number (1212120).

Almost surely, 2^25329321 is an apocalyptic number.

It is an amenable number.

25329321 is a deficient number, since it is larger than the sum of its proper divisors (13458519).

25329321 is a wasteful number, since it uses less digits than its factorization.

25329321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 328 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 25329321 is about 5032.8243561642. The cubic root of 25329321 is about 293.6800976872.

The spelling of 25329321 in words is "twenty-five million, three hundred twenty-nine thousand, three hundred twenty-one".