2136645 has 96 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 870912.

The previous prime is 2136643. The next prime is 2136649. The reversal of 2136645 is 5466312.

2136645 is a `hidden beast` number, since 2 + 13 + 6 + 645 = 666.

It is not a de Polignac number, because 2136645 - 2¹ = 2136643 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 (2136643) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 112446 + ... + 112464.

It is an arithmetic number, because the mean of its divisors is an integer number (51300).

2^2136645 is an apocalyptic number.

It is an amenable number.

2136645 is an abundant number, since it is smaller than the sum of its proper divisors (2788155).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2136645 is a wasteful number, since it uses less digits than its factorization.

2136645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 51 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2136645 is about 1461.7267186448. The cubic root of 2136645 is about 128.7984955716.

The spelling of 2136645 in words is "two million, one hundred thirty-six thousand, six hundred forty-five".