1799172 has 42 divisors (see below), whose sum is σ = 4728318. Its totient is φ = 598752.

The previous prime is 1799153. The next prime is 1799173. The reversal of 1799172 is 2719971.

It can be written as a sum of positive squares in only one way, i.e., 1052676 + 746496 = 1026^2 + 864^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1799173) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2608 + ... + 3224.

It is an arithmetic number, because the mean of its divisors is an integer number (112579).

2^1799172 is an apocalyptic number.

1799172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1799172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2364159).

1799172 is an abundant number, since it is smaller than the sum of its proper divisors (2929146).

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

1799172 is an equidigital number, since it uses as much as digits as its factorization.

1799172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 622 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1799172 is about 1341.3321736244. The cubic root of 1799172 is about 121.6253849646.

The spelling of 1799172 in words is "one million, seven hundred ninety-nine thousand, one hundred seventy-two".