5642621 has 4 divisors (see below), whose sum is σ = 5650272. Its totient is φ = 5634972.

The previous prime is 5642599. The next prime is 5642627. The reversal of 5642621 is 1262465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5642621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5642627) 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 3 ways as a sum of consecutive naturals, for example, 2585 + ... + 4238.

It is an arithmetic number, because the mean of its divisors is an integer number (1412568).

Almost surely, 2^5642621 is an apocalyptic number.

It is an amenable number.

5642621 is a deficient number, since it is larger than the sum of its proper divisors (7651).

5642621 is an equidigital number, since it uses as much as digits as its factorization.

5642621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650.

The product of its digits is 2880, while the sum is 26.

The square root of 5642621 is about 2375.4201733588. The cubic root of 5642621 is about 178.0301783617.

The spelling of 5642621 in words is "five million, six hundred forty-two thousand, six hundred twenty-one".