2156562 has 12 divisors (see below), whose sum is σ = 4672590. Its totient is φ = 718848.

The previous prime is 2156537. The next prime is 2156597. The reversal of 2156562 is 2656512.

2156562 is a `hidden beast` number, since 2 + 1 + 5 + 656 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1252161 + 904401 = 1119^2 + 951^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59887 + ... + 59922.

2^2156562 is an apocalyptic number.

2156562 is an abundant number, since it is smaller than the sum of its proper divisors (2516028).

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

2156562 is a wasteful number, since it uses less digits than its factorization.

2156562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119817 (or 119814 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2156562 is about 1468.5237485312. The cubic root of 2156562 is about 129.1974621451.

The spelling of 2156562 in words is "two million, one hundred fifty-six thousand, five hundred sixty-two".