33121425 has 12 divisors (see below), whose sum is σ = 54760880. Its totient is φ = 17664720.

The previous prime is 33121411. The next prime is 33121441. The reversal of 33121425 is 52412133.

It is not a de Polignac number, because 33121425 - 2⁸ = 33121169 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 220735 + ... + 220884.

Almost surely, 2^33121425 is an apocalyptic number.

It is an amenable number.

33121425 is a deficient number, since it is larger than the sum of its proper divisors (21639455).

33121425 is a wasteful number, since it uses less digits than its factorization.

33121425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441632 (or 441627 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 33121425 is about 5755.1216320769. The cubic root of 33121425 is about 321.1463604070.

Adding to 33121425 its reverse (52412133), we get a palindrome (85533558).

The spelling of 33121425 in words is "thirty-three million, one hundred twenty-one thousand, four hundred twenty-five".