2156966 has 16 divisors (see below), whose sum is σ = 3784704. Its totient is φ = 902664.

The previous prime is 2156939. The next prime is 2156993. The reversal of 2156966 is 6696512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2156939) and next prime (2156993).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190 + ... + 2393.

It is an arithmetic number, because the mean of its divisors is an integer number (236544).

2^2156966 is an apocalyptic number.

2156966 is a deficient number, since it is larger than the sum of its proper divisors (1627738).

2156966 is a wasteful number, since it uses less digits than its factorization.

2156966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635.

The product of its digits is 19440, while the sum is 35.

The square root of 2156966 is about 1468.6612951937. The cubic root of 2156966 is about 129.2055293860.

The spelling of 2156966 in words is "two million, one hundred fifty-six thousand, nine hundred sixty-six".