2157064 has 32 divisors (see below), whose sum is σ = 4979520. Its totient is φ = 853056.

The previous prime is 2157041. The next prime is 2157091. The reversal of 2157064 is 4607512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 754 + ... + 2209.

It is an arithmetic number, because the mean of its divisors is an integer number (155610).

2^2157064 is an apocalyptic number.

It is an amenable number.

2157064 is an abundant number, since it is smaller than the sum of its proper divisors (2822456).

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

2157064 is a wasteful number, since it uses less digits than its factorization.

2157064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989 (or 2985 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2157064 is about 1468.6946585319. The cubic root of 2157064 is about 129.2074861392.

The spelling of 2157064 in words is "two million, one hundred fifty-seven thousand, sixty-four".