1564423 has 8 divisors (see below), whose sum is σ = 1824800. Its totient is φ = 1340640.

The previous prime is 1564421. The next prime is 1564427. The reversal of 1564423 is 3244651.

It is not a de Polignac number, because 1564423 - 2¹ = 1564421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564421) 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, 1938 + ... + 2623.

It is an arithmetic number, because the mean of its divisors is an integer number (228100).

2^1564423 is an apocalyptic number.

1564423 is a deficient number, since it is larger than the sum of its proper divisors (260377).

1564423 is an frugal number, since it uses more digits than its factorization.

1564423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582 (or 4568 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 1564423 is about 1250.7689634781. The cubic root of 1564423 is about 116.0873054596.

The spelling of 1564423 in words is "one million, five hundred sixty-four thousand, four hundred twenty-three".