1521564 has 24 divisors (see below), whose sum is σ = 3873408. Its totient is φ = 461040.

The previous prime is 1521563. The next prime is 1521571. The reversal of 1521564 is 4651251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521563) 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 in 7 ways as a sum of consecutive naturals, for example, 5632 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (161392).

2^1521564 is an apocalyptic number.

It is an amenable number.

1521564 is an abundant number, since it is smaller than the sum of its proper divisors (2351844).

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

1521564 is a wasteful number, since it uses less digits than its factorization.

1521564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545 (or 11543 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 1521564 is about 1233.5169232726. The cubic root of 1521564 is about 115.0173634778.

The spelling of 1521564 in words is "one million, five hundred twenty-one thousand, five hundred sixty-four".