2135997 has 8 divisors (see below), whose sum is σ = 3164480. Its totient is φ = 1423980.

The previous prime is 2135971. The next prime is 2136011. The reversal of 2135997 is 7995312.

It is not a de Polignac number, because 2135997 - 2⁶ = 2135933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135957) 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, 39529 + ... + 39582.

It is an arithmetic number, because the mean of its divisors is an integer number (395560).

2^2135997 is an apocalyptic number.

2135997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2135997 is a deficient number, since it is larger than the sum of its proper divisors (1028483).

2135997 is an equidigital number, since it uses as much as digits as its factorization.

2135997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79120 (or 79114 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 2135997 is about 1461.5050461767. The cubic root of 2135997 is about 128.7854736199.

The spelling of 2135997 in words is "two million, one hundred thirty-five thousand, nine hundred ninety-seven".