7640542 has 16 divisors (see below), whose sum is σ = 14105952. Its totient is φ = 3022560.

The previous prime is 7640519. The next prime is 7640579. The reversal of 7640542 is 2450467.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7640542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20809 + ... + 21172.

It is an arithmetic number, because the mean of its divisors is an integer number (881622).

Almost surely, 2^7640542 is an apocalyptic number.

7640542 is a deficient number, since it is larger than the sum of its proper divisors (6465410).

7640542 is a wasteful number, since it uses less digits than its factorization.

7640542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42003.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 7640542 is about 2764.1530348373. The cubic root of 7640542 is about 196.9584974456.

The spelling of 7640542 in words is "seven million, six hundred forty thousand, five hundred forty-two".