7172621 has 4 divisors (see below), whose sum is σ = 7178112. Its totient is φ = 7167132.

The previous prime is 7172617. The next prime is 7172639. The reversal of 7172621 is 1262717.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7172621 - 2² = 7172617 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 (7172681) 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, 470 + ... + 3816.

It is an arithmetic number, because the mean of its divisors is an integer number (1794528).

Almost surely, 2^7172621 is an apocalyptic number.

It is an amenable number.

7172621 is a deficient number, since it is larger than the sum of its proper divisors (5491).

7172621 is a wasteful number, since it uses less digits than its factorization.

7172621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5490.

The product of its digits is 1176, while the sum is 26.

The square root of 7172621 is about 2678.1749382742. The cubic root of 7172621 is about 192.8528055201.

The spelling of 7172621 in words is "seven million, one hundred seventy-two thousand, six hundred twenty-one".