1565164 has 6 divisors (see below), whose sum is σ = 2739044. Its totient is φ = 782580.

The previous prime is 1565153. The next prime is 1565167. The reversal of 1565164 is 4615651.

It is not an unprimeable number, because it can be changed into a prime (1565167) by changing a digit.

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, 195642 + ... + 195649.

2^1565164 is an apocalyptic number.

It is an amenable number.

1565164 is a deficient number, since it is larger than the sum of its proper divisors (1173880).

1565164 is a wasteful number, since it uses less digits than its factorization.

1565164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391295 (or 391293 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 1565164 is about 1251.0651461854. The cubic root of 1565164 is about 116.1056310905.

It can be divided in two parts, 156516 and 4, that added together give a triangular number (156520 = T₅₅₉).

The spelling of 1565164 in words is "one million, five hundred sixty-five thousand, one hundred sixty-four".