1620564 has 24 divisors (see below), whose sum is σ = 4125408. Its totient is φ = 491040.

The previous prime is 1620551. The next prime is 1620569. The reversal of 1620564 is 4650261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6007 + ... + 6270.

It is an arithmetic number, because the mean of its divisors is an integer number (171892).

2^1620564 is an apocalyptic number.

It is an amenable number.

1620564 is an abundant number, since it is smaller than the sum of its proper divisors (2504844).

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

1620564 is a wasteful number, since it uses less digits than its factorization.

1620564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12295 (or 12293 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1620564 is about 1273.0137469800. The cubic root of 1620564 is about 117.4596571929.

The spelling of 1620564 in words is "one million, six hundred twenty thousand, five hundred sixty-four".