2160561 has 8 divisors (see below), whose sum is σ = 3102400. Its totient is φ = 1329552.

The previous prime is 2160553. The next prime is 2160563. The reversal of 2160561 is 1650612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2160561 - 2³ = 2160553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2160563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27661 + ... + 27738.

It is an arithmetic number, because the mean of its divisors is an integer number (387800).

2^2160561 is an apocalyptic number.

It is an amenable number.

2160561 is a deficient number, since it is larger than the sum of its proper divisors (941839).

2160561 is a wasteful number, since it uses less digits than its factorization.

2160561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55415.

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

The square root of 2160561 is about 1469.8846893549. The cubic root of 2160561 is about 129.2772715245.

The spelling of 2160561 in words is "two million, one hundred sixty thousand, five hundred sixty-one".