1813564 has 12 divisors (see below), whose sum is σ = 3198888. Its totient is φ = 899600.

The previous prime is 1813561. The next prime is 1813579. The reversal of 1813564 is 4653181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207 + ... + 2254.

It is an arithmetic number, because the mean of its divisors is an integer number (266574).

2^1813564 is an apocalyptic number.

It is an amenable number.

1813564 is a deficient number, since it is larger than the sum of its proper divisors (1385324).

1813564 is a wasteful number, since it uses less digits than its factorization.

1813564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596 (or 3594 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 1813564 is about 1346.6863034872. The cubic root of 1813564 is about 121.9488274145.

The spelling of 1813564 in words is "one million, eight hundred thirteen thousand, five hundred sixty-four".