2170961 has 8 divisors (see below), whose sum is σ = 2413824. Its totient is φ = 1938960.

The previous prime is 2170943. The next prime is 2171003. The reversal of 2170961 is 1690712.

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

It is a cyclic number.

It is not a de Polignac number, because 2170961 - 2⁶ = 2170897 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2170961.

It is not an unprimeable number, because it can be changed into a prime (2170061) 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, 2291 + ... + 3096.

It is an arithmetic number, because the mean of its divisors is an integer number (301728).

2^2170961 is an apocalyptic number.

It is an amenable number.

2170961 is a deficient number, since it is larger than the sum of its proper divisors (242863).

2170961 is a wasteful number, since it uses less digits than its factorization.

2170961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2170961 is about 1473.4181348144. The cubic root of 2170961 is about 129.4843677557.

Subtracting from 2170961 its reverse (1690712), we obtain a square (480249 = 693²).

The spelling of 2170961 in words is "two million, one hundred seventy thousand, nine hundred sixty-one".