2621138 has 16 divisors (see below), whose sum is σ = 4295256. Its totient is φ = 1192320.

The previous prime is 2621137. The next prime is 2621147. The reversal of 2621138 is 8311262.

It can be written as a sum of positive squares in 4 ways, for example, as 1841449 + 779689 = 1357^2 + 883^2 .

2621138 is a modest number, since divided by 21138 gives 26 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2621131) 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, 1208 + ... + 2588.

2^2621138 is an apocalyptic number.

2621138 is a deficient number, since it is larger than the sum of its proper divisors (1674118).

2621138 is a wasteful number, since it uses less digits than its factorization.

2621138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469.

The product of its digits is 576, while the sum is 23.

The square root of 2621138 is about 1618.9928968343. The cubic root of 2621138 is about 137.8785250427.

Adding to 2621138 its sum of digits (23), we get a square (2621161 = 1619²).

The spelling of 2621138 in words is "two million, six hundred twenty-one thousand, one hundred thirty-eight".