1722972 has 24 divisors (see below), whose sum is σ = 4082176. Its totient is φ = 565488.

The previous prime is 1722937. The next prime is 1722983. The reversal of 1722972 is 2792271.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268 + ... + 1875.

2^1722972 is an apocalyptic number.

1722972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1722972 is an abundant number, since it is smaller than the sum of its proper divisors (2359204).

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

1722972 is a wasteful number, since it uses less digits than its factorization.

1722972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2215 counting only the distinct ones).

The product of its digits is 3528, while the sum is 30.

The square root of 1722972 is about 1312.6202802029. The cubic root of 1722972 is about 119.8834980418.

The spelling of 1722972 in words is "one million, seven hundred twenty-two thousand, nine hundred seventy-two".