2135657 has 4 divisors (see below), whose sum is σ = 2248080. Its totient is φ = 2023236.

The previous prime is 2135641. The next prime is 2135663. The reversal of 2135657 is 7565312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2135657 - 2⁴ = 2135641 is a prime.

It is a super-2 number, since 2×2135657² = 9122061643298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2135687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56183 + ... + 56220.

It is an arithmetic number, because the mean of its divisors is an integer number (562020).

2^2135657 is an apocalyptic number.

It is an amenable number.

2135657 is a deficient number, since it is larger than the sum of its proper divisors (112423).

2135657 is a wasteful number, since it uses less digits than its factorization.

2135657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112422.

The product of its digits is 6300, while the sum is 29.

The square root of 2135657 is about 1461.3887230987. The cubic root of 2135657 is about 128.7786400609.

The spelling of 2135657 in words is "two million, one hundred thirty-five thousand, six hundred fifty-seven".