1605964 has 12 divisors (see below), whose sum is σ = 2876104. Its totient is φ = 784224.

The previous prime is 1605941. The next prime is 1605971. The reversal of 1605964 is 4695061.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 4497 + ... + 4840.

2^1605964 is an apocalyptic number.

It is an amenable number.

1605964 is a deficient number, since it is larger than the sum of its proper divisors (1270140).

1605964 is a wasteful number, since it uses less digits than its factorization.

1605964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384 (or 9382 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1605964 is about 1267.2663492731. The cubic root of 1605964 is about 117.1058530184.

The spelling of 1605964 in words is "one million, six hundred five thousand, nine hundred sixty-four".