7138724 has 12 divisors (see below), whose sum is σ = 12614784. Its totient is φ = 3534504.

The previous prime is 7138723. The next prime is 7138741. The reversal of 7138724 is 4278317.

It is a happy number.

It is a super-2 number, since 2×7138724² = 101922760696352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7138723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8252 + ... + 9075.

It is an arithmetic number, because the mean of its divisors is an integer number (1051232).

Almost surely, 2^7138724 is an apocalyptic number.

It is an amenable number.

7138724 is a deficient number, since it is larger than the sum of its proper divisors (5476060).

7138724 is a wasteful number, since it uses less digits than its factorization.

7138724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17434 (or 17432 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 7138724 is about 2671.8390670098. The cubic root of 7138724 is about 192.5485254627.

The spelling of 7138724 in words is "seven million, one hundred thirty-eight thousand, seven hundred twenty-four".