2138975 has 12 divisors (see below), whose sum is σ = 2694024. Its totient is φ = 1684320.

The previous prime is 2138971. The next prime is 2138987. The reversal of 2138975 is 5798312.

2138975 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 2138975 - 2² = 2138971 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138971) 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 11 ways as a sum of consecutive naturals, for example, 1037 + ... + 2313.

It is an arithmetic number, because the mean of its divisors is an integer number (224502).

2^2138975 is an apocalyptic number.

2138975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2138975 is a deficient number, since it is larger than the sum of its proper divisors (555049).

2138975 is a wasteful number, since it uses less digits than its factorization.

2138975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 1349 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 2138975 is about 1462.5235040846. The cubic root of 2138975 is about 128.8452965882.

It can be divided in two parts, 2138 and 975, that added together give a palindrome (3113).

The spelling of 2138975 in words is "two million, one hundred thirty-eight thousand, nine hundred seventy-five".