1722566 has 8 divisors (see below), whose sum is σ = 2589744. Its totient is φ = 859320.

The previous prime is 1722563. The next prime is 1722587. The reversal of 1722566 is 6652271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1722566³ = 15333767266117252488, which contains 333 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 671 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (323718).

2^1722566 is an apocalyptic number.

1722566 is a deficient number, since it is larger than the sum of its proper divisors (867178).

1722566 is a wasteful number, since it uses less digits than its factorization.

1722566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its digits is 5040, while the sum is 29.

The square root of 1722566 is about 1312.4656185973. The cubic root of 1722566 is about 119.8740808790.

The spelling of 1722566 in words is "one million, seven hundred twenty-two thousand, five hundred sixty-six".