172726042 has 4 divisors (see below), whose sum is σ = 259089066. Its totient is φ = 86363020.

The previous prime is 172726007. The next prime is 172726051. The reversal of 172726042 is 240627271.

172726042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240627271 = 107 ⋅2248853.

It can be written as a sum of positive squares in only one way, i.e., 93141801 + 79584241 = 9651^2 + 8921^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 172725995 and 172726013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43181509 + ... + 43181512.

Almost surely, 2^172726042 is an apocalyptic number.

172726042 is a deficient number, since it is larger than the sum of its proper divisors (86363024).

172726042 is an equidigital number, since it uses as much as digits as its factorization.

172726042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86363023.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 172726042 is about 13142.5279912200. The cubic root of 172726042 is about 556.9111851230.

The spelling of 172726042 in words is "one hundred seventy-two million, seven hundred twenty-six thousand, forty-two".