1722564 has 36 divisors (see below), whose sum is σ = 4433520. Its totient is φ = 563760.

The previous prime is 1722563. The next prime is 1722587. The reversal of 1722564 is 4652271.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1722564³ = 15333713855974026432, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1722563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1719 + ... + 2529.

2^1722564 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 1722564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216760).

1722564 is an abundant number, since it is smaller than the sum of its proper divisors (2710956).

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

1722564 is a wasteful number, since it uses less digits than its factorization.

1722564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 875 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1722564 is about 1312.4648566724. The cubic root of 1722564 is about 119.8740344853.

The spelling of 1722564 in words is "one million, seven hundred twenty-two thousand, five hundred sixty-four".