32665421 has 2 divisors, whose sum is σ = 32665422. Its totient is φ = 32665420.

The previous prime is 32665387. The next prime is 32665441. The reversal of 32665421 is 12456623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 15625 = 5714^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 32665421 - 2¹⁰ = 32664397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32665441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16332710 + 16332711.

It is an arithmetic number, because the mean of its divisors is an integer number (16332711).

Almost surely, 2^32665421 is an apocalyptic number.

It is an amenable number.

32665421 is a deficient number, since it is larger than the sum of its proper divisors (1).

32665421 is an equidigital number, since it uses as much as digits as its factorization.

32665421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 32665421 is about 5715.3670923222. The cubic root of 32665421 is about 319.6657349399.

The spelling of 32665421 in words is "thirty-two million, six hundred sixty-five thousand, four hundred twenty-one".