180742 has 4 divisors (see below), whose sum is σ = 271116. Its totient is φ = 90370.

The previous prime is 180731. The next prime is 180749. The reversal of 180742 is 247081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247081 = 211 ⋅1171.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45184 + ... + 45187.

It is an arithmetic number, because the mean of its divisors is an integer number (67779).

2¹⁸⁰⁷⁴² is an apocalyptic number.

180742 is a deficient number, since it is larger than the sum of its proper divisors (90374).

180742 is an equidigital number, since it uses as much as digits as its factorization.

180742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90373.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 180742 is about 425.1376247758. The cubic root of 180742 is about 56.5396385639.

It can be divided in two parts, 1807 and 42, that added together give a square (1849 = 43²).

The spelling of 180742 in words is "one hundred eighty thousand, seven hundred forty-two".