1722872 has 8 divisors (see below), whose sum is σ = 3230400. Its totient is φ = 861432.

The previous prime is 1722869. The next prime is 1722883. The reversal of 1722872 is 2782271.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107672 + ... + 107687.

It is an arithmetic number, because the mean of its divisors is an integer number (403800).

2^1722872 is an apocalyptic number.

It is an amenable number.

1722872 is a deficient number, since it is larger than the sum of its proper divisors (1507528).

1722872 is a wasteful number, since it uses less digits than its factorization.

1722872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215365 (or 215361 counting only the distinct ones).

The product of its digits is 3136, while the sum is 29.

The square root of 1722872 is about 1312.5821879029. The cubic root of 1722872 is about 119.8811786809.

The spelling of 1722872 in words is "one million, seven hundred twenty-two thousand, eight hundred seventy-two".