2157964 has 12 divisors (see below), whose sum is σ = 3824800. Its totient is φ = 1065168.

The previous prime is 2157923. The next prime is 2157989. The reversal of 2157964 is 4697512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099 + ... + 3730.

2^2157964 is an apocalyptic number.

It is an amenable number.

2157964 is a deficient number, since it is larger than the sum of its proper divisors (1666836).

2157964 is a wasteful number, since it uses less digits than its factorization.

2157964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912 (or 6910 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 2157964 is about 1469.0010211024. The cubic root of 2157964 is about 129.2254535505.

The spelling of 2157964 in words is "two million, one hundred fifty-seven thousand, nine hundred sixty-four".