2045864 has 8 divisors (see below), whose sum is σ = 3836010. Its totient is φ = 1022928.

The previous prime is 2045851. The next prime is 2045881. The reversal of 2045864 is 4685402.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 432964 = 1270^2 + 658^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127859 + ... + 127874.

2^2045864 is an apocalyptic number.

It is an amenable number.

2045864 is a deficient number, since it is larger than the sum of its proper divisors (1790146).

2045864 is a wasteful number, since it uses less digits than its factorization.

2045864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255739 (or 255735 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2045864 is about 1430.3370232221. The cubic root of 2045864 is about 126.9479192079.

The spelling of 2045864 in words is "two million, forty-five thousand, eight hundred sixty-four".