2118724 has 6 divisors (see below), whose sum is σ = 3707774. Its totient is φ = 1059360.

The previous prime is 2118703. The next prime is 2118733. The reversal of 2118724 is 4278112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1932100 + 186624 = 1390^2 + 432^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264837 + ... + 264844.

2^2118724 is an apocalyptic number.

It is an amenable number.

2118724 is a deficient number, since it is larger than the sum of its proper divisors (1589050).

2118724 is a wasteful number, since it uses less digits than its factorization.

2118724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529685 (or 529683 counting only the distinct ones).

The product of its digits is 896, while the sum is 25.

The square root of 2118724 is about 1455.5837317035. The cubic root of 2118724 is about 128.4373871710.

The spelling of 2118724 in words is "two million, one hundred eighteen thousand, seven hundred twenty-four".