345172 has 6 divisors (see below), whose sum is σ = 604058. Its totient is φ = 172584.

The previous prime is 345143. The next prime is 345181. The reversal of 345172 is 271543.

It can be written as a sum of positive squares in only one way, i.e., 188356 + 156816 = 434^2 + 396^2 .

It is a congruent number.

It is an unprimeable number.

345172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43143 + ... + 43150.

2³⁴⁵¹⁷² is an apocalyptic number.

It is an amenable number.

345172 is a deficient number, since it is larger than the sum of its proper divisors (258886).

345172 is a wasteful number, since it uses less digits than its factorization.

345172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86297 (or 86295 counting only the distinct ones).

The product of its digits is 840, while the sum is 22.

The square root of 345172 is about 587.5134041024. The cubic root of 345172 is about 70.1474443150.

It can be divided in two parts, 345 and 172, that multiplied together give a triangular number (59340 = T₃₄₄).

The spelling of 345172 in words is "three hundred forty-five thousand, one hundred seventy-two".