32645621 has 4 divisors (see below), whose sum is σ = 32690892. Its totient is φ = 32600352.

The previous prime is 32645597. The next prime is 32645647. The reversal of 32645621 is 12654623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32364721 + 280900 = 5689^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 32645621 - 2¹⁴ = 32629237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32645521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21536 + ... + 23001.

It is an arithmetic number, because the mean of its divisors is an integer number (8172723).

Almost surely, 2^32645621 is an apocalyptic number.

It is an amenable number.

32645621 is a deficient number, since it is larger than the sum of its proper divisors (45271).

32645621 is an equidigital number, since it uses as much as digits as its factorization.

32645621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45270.

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

The square root of 32645621 is about 5713.6346575538. The cubic root of 32645621 is about 319.6011338967.

The spelling of 32645621 in words is "thirty-two million, six hundred forty-five thousand, six hundred twenty-one".