1564536 has 64 divisors (see below), whose sum is σ = 4262400. Its totient is φ = 476928.

The previous prime is 1564501. The next prime is 1564543. The reversal of 1564536 is 6354651.

Its product of digits (10800) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21396 + ... + 21468.

It is an arithmetic number, because the mean of its divisors is an integer number (66600).

2^1564536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1564536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2131200).

1564536 is an abundant number, since it is smaller than the sum of its proper divisors (2697864).

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

1564536 is a wasteful number, since it uses less digits than its factorization.

1564536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 144 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 1564536 is about 1250.8141348738. The cubic root of 1564536 is about 116.0901004304.

The spelling of 1564536 in words is "one million, five hundred sixty-four thousand, five hundred thirty-six".