7431561 has 32 divisors (see below), whose sum is σ = 11637120. Its totient is φ = 4681152.

The previous prime is 7431551. The next prime is 7431563. The reversal of 7431561 is 1651347.

7431561 is a `hidden beast` number, since 74 + 31 + 561 = 666.

7431561 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 7431561 - 2⁶ = 7431497 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (7431563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42871 + ... + 43043.

It is an arithmetic number, because the mean of its divisors is an integer number (363660).

Almost surely, 2^7431561 is an apocalyptic number.

It is an amenable number.

7431561 is a deficient number, since it is larger than the sum of its proper divisors (4205559).

7431561 is a wasteful number, since it uses less digits than its factorization.

7431561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 256 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 7431561 is about 2726.0889567290. The cubic root of 7431561 is about 195.1461626055.

It can be divided in two parts, 743 and 1561, that added together give a square (2304 = 48²).

The spelling of 7431561 in words is "seven million, four hundred thirty-one thousand, five hundred sixty-one".