7457643 has 8 divisors (see below), whose sum is σ = 11048400. Its totient is φ = 4971744.

The previous prime is 7457641. The next prime is 7457647. The reversal of 7457643 is 3467547.

7457643 is a `hidden beast` number, since 7 + 4 + 5 + 7 + 643 = 666.

It is not a de Polignac number, because 7457643 - 2¹ = 7457641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7457598 and 7457607.

It is not an unprimeable number, because it can be changed into a prime (7457641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138078 + ... + 138131.

It is an arithmetic number, because the mean of its divisors is an integer number (1381050).

Almost surely, 2^7457643 is an apocalyptic number.

7457643 is a deficient number, since it is larger than the sum of its proper divisors (3590757).

7457643 is a wasteful number, since it uses less digits than its factorization.

7457643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276218 (or 276212 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 7457643 is about 2730.8685431562. The cubic root of 7457643 is about 195.3741927310.

It can be divided in two parts, 7457 and 643, that added together give a square (8100 = 90²).

The spelling of 7457643 in words is "seven million, four hundred fifty-seven thousand, six hundred forty-three".