2138722 has 8 divisors (see below), whose sum is σ = 3217500. Its totient is φ = 1066224.

The previous prime is 2138713. The next prime is 2138737. The reversal of 2138722 is 2278312.

It can be written as a sum of positive squares in 2 ways, for example, as 1879641 + 259081 = 1371^2 + 509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597 + ... + 2152.

2^2138722 is an apocalyptic number.

2138722 is a deficient number, since it is larger than the sum of its proper divisors (1078778).

2138722 is a wasteful number, since it uses less digits than its factorization.

2138722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140.

The product of its digits is 1344, while the sum is 25.

The square root of 2138722 is about 1462.4370071904. The cubic root of 2138722 is about 128.8402164065.

The spelling of 2138722 in words is "two million, one hundred thirty-eight thousand, seven hundred twenty-two".