1872173 has 2 divisors, whose sum is σ = 1872174. Its totient is φ = 1872172.

The previous prime is 1872149. The next prime is 1872217. The reversal of 1872173 is 3712781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 946729 + 925444 = 973^2 + 962^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872173 - 2⁶ = 1872109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1872113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936086 + 936087.

It is an arithmetic number, because the mean of its divisors is an integer number (936087).

2^1872173 is an apocalyptic number.

It is an amenable number.

1872173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872173 is an equidigital number, since it uses as much as digits as its factorization.

1872173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 29.

The square root of 1872173 is about 1368.2737299240. The cubic root of 1872173 is about 123.2485993749.

It can be divided in two parts, 187 and 2173, that multiplied together give a triangular number (406351 = T₉₀₁).

The spelling of 1872173 in words is "one million, eight hundred seventy-two thousand, one hundred seventy-three".