2115664 has 10 divisors (see below), whose sum is σ = 4099130. Its totient is φ = 1057824.

The previous prime is 2115653. The next prime is 2115671. The reversal of 2115664 is 4665112.

It can be written as a sum of positive squares in only one way, i.e., 1488400 + 627264 = 1220^2 + 792^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66099 + ... + 66130.

It is an arithmetic number, because the mean of its divisors is an integer number (409913).

2^2115664 is an apocalyptic number.

It is an amenable number.

2115664 is a deficient number, since it is larger than the sum of its proper divisors (1983466).

2115664 is a wasteful number, since it uses less digits than its factorization.

2115664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132237 (or 132231 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 2115664 is about 1454.5322272126. The cubic root of 2115664 is about 128.3755248167.

The spelling of 2115664 in words is "two million, one hundred fifteen thousand, six hundred sixty-four".