7920531 has 16 divisors (see below), whose sum is σ = 12113920. Its totient is φ = 5109480.

The previous prime is 7920529. The next prime is 7920551. The reversal of 7920531 is 1350297.

7920531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7920531 - 2¹ = 7920529 is a prime.

It is a super-2 number, since 2×7920531² = 125469622643922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7920495 and 7920504.

It is not an unprimeable number, because it can be changed into a prime (7920551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3895 + ... + 5568.

It is an arithmetic number, because the mean of its divisors is an integer number (757120).

Almost surely, 2^7920531 is an apocalyptic number.

7920531 is a deficient number, since it is larger than the sum of its proper divisors (4193389).

7920531 is a wasteful number, since it uses less digits than its factorization.

7920531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503 (or 9497 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 7920531 is about 2814.3437956298. The cubic root of 7920531 is about 199.3355533310.

The spelling of 7920531 in words is "seven million, nine hundred twenty thousand, five hundred thirty-one".