2138751 has 16 divisors (see below), whose sum is σ = 3201120. Its totient is φ = 1411200.

The previous prime is 2138749. The next prime is 2138789. The reversal of 2138751 is 1578312.

2138751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2138751 - 2¹ = 2138749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2701 + ... + 3401.

It is an arithmetic number, because the mean of its divisors is an integer number (200070).

2^2138751 is an apocalyptic number.

2138751 is a deficient number, since it is larger than the sum of its proper divisors (1062369).

2138751 is a wasteful number, since it uses less digits than its factorization.

2138751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 817 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 2138751 is about 1462.4469221138. The cubic root of 2138751 is about 128.8407987401.

The spelling of 2138751 in words is "two million, one hundred thirty-eight thousand, seven hundred fifty-one".