2161560 has 32 divisors (see below), whose sum is σ = 6485040. Its totient is φ = 576384.

The previous prime is 2161553. The next prime is 2161571. The reversal of 2161560 is 651612.

It is a happy number.

2161560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8887 + ... + 9126.

2^2161560 is an apocalyptic number.

2161560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161560 is an abundant number, since it is smaller than the sum of its proper divisors (4323480).

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

2161560 is a wasteful number, since it uses less digits than its factorization.

2161560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18027 (or 18023 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2161560 is about 1470.2244726572. The cubic root of 2161560 is about 129.2971935253.

The spelling of 2161560 in words is "two million, one hundred sixty-one thousand, five hundred sixty".