1722159 has 12 divisors (see below), whose sum is σ = 2503800. Its totient is φ = 1140624.

The previous prime is 1722137. The next prime is 1722163. The reversal of 1722159 is 9512271.

It is not a de Polignac number, because 1722159 - 2⁷ = 1722031 is a prime.

1722159 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722199) 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, 1077 + ... + 2145.

It is an arithmetic number, because the mean of its divisors is an integer number (208650).

2^1722159 is an apocalyptic number.

1722159 is a deficient number, since it is larger than the sum of its proper divisors (781641).

1722159 is a wasteful number, since it uses less digits than its factorization.

1722159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1251 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1722159 is about 1312.3105577568. The cubic root of 1722159 is about 119.8646390358.

It can be divided in two parts, 1722 and 159, that added together give a palindrome (1881).

The spelling of 1722159 in words is "one million, seven hundred twenty-two thousand, one hundred fifty-nine".