2115975 has 24 divisors (see below), whose sum is σ = 3548880. Its totient is φ = 1112320.

The previous prime is 2115961. The next prime is 2115979. The reversal of 2115975 is 5795112.

It is not a de Polignac number, because 2115975 - 2⁵ = 2115943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6517 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (147870).

2^2115975 is an apocalyptic number.

2115975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2115975 is a deficient number, since it is larger than the sum of its proper divisors (1432905).

2115975 is a wasteful number, since it uses less digits than its factorization.

2115975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 414 counting only the distinct ones).

The product of its digits is 3150, while the sum is 30.

The square root of 2115975 is about 1454.6391305063. The cubic root of 2115975 is about 128.3818148565.

The spelling of 2115975 in words is "two million, one hundred fifteen thousand, nine hundred seventy-five".