2157136 has 20 divisors (see below), whose sum is σ = 4324500. Its totient is φ = 1041152.

The previous prime is 2157131. The next prime is 2157149. The reversal of 2157136 is 6317512.

It can be written as a sum of positive squares in 2 ways, for example, as 1742400 + 414736 = 1320^2 + 644^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2157136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157131) 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, 1861 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (216225).

2^2157136 is an apocalyptic number.

It is an amenable number.

2157136 is an abundant number, since it is smaller than the sum of its proper divisors (2167364).

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

2157136 is a wasteful number, since it uses less digits than its factorization.

2157136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4686 (or 4680 counting only the distinct ones).

The product of its digits is 1260, while the sum is 25.

The square root of 2157136 is about 1468.7191698892. The cubic root of 2157136 is about 129.2089237160.

The spelling of 2157136 in words is "two million, one hundred fifty-seven thousand, one hundred thirty-six".