2138774 has 16 divisors (see below), whose sum is σ = 3554496. Its totient is φ = 957000.

The previous prime is 2138749. The next prime is 2138789. The reversal of 2138774 is 4778312.

It is a happy number.

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 2138774.

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, 749 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (222156).

2^2138774 is an apocalyptic number.

2138774 is a deficient number, since it is larger than the sum of its proper divisors (1415722).

2138774 is a wasteful number, since it uses less digits than its factorization.

2138774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531.

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

The square root of 2138774 is about 1462.4547856259. The cubic root of 2138774 is about 128.8412605872.

The spelling of 2138774 in words is "two million, one hundred thirty-eight thousand, seven hundred seventy-four".