32257921 has 2 divisors, whose sum is σ = 32257922. Its totient is φ = 32257920.

The previous prime is 32257909. The next prime is 32257963. The reversal of 32257921 is 12975223.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22429696 + 9828225 = 4736^2 + 3135^2 .

It is a cyclic number.

It is not a de Polignac number, because 32257921 - 2⁷ = 32257793 is a prime.

It is not a weakly prime, because it can be changed into another prime (32257321) 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 as a sum of consecutive naturals, namely, 16128960 + 16128961.

It is an arithmetic number, because the mean of its divisors is an integer number (16128961).

Almost surely, 2^32257921 is an apocalyptic number.

It is an amenable number.

32257921 is a deficient number, since it is larger than the sum of its proper divisors (1).

32257921 is an equidigital number, since it uses as much as digits as its factorization.

32257921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 32257921 is about 5679.6057081456. The cubic root of 32257921 is about 318.3308957597.

The spelling of 32257921 in words is "thirty-two million, two hundred fifty-seven thousand, nine hundred twenty-one".