747621 has 12 divisors (see below), whose sum is σ = 1234272. Its totient is φ = 427176.

The previous prime is 747619. The next prime is 747647. The reversal of 747621 is 126747.

747621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 747621 - 2¹ = 747619 is a prime.

747621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5871 + ... + 5996.

It is an arithmetic number, because the mean of its divisors is an integer number (102856).

2⁷⁴⁷⁶²¹ is an apocalyptic number.

It is an amenable number.

747621 is a deficient number, since it is larger than the sum of its proper divisors (486651).

747621 is a wasteful number, since it uses less digits than its factorization.

747621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11880 (or 11877 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 747621 is about 864.6507965647. The cubic root of 747621 is about 90.7598627807.

The spelling of 747621 in words is "seven hundred forty-seven thousand, six hundred twenty-one".