345742 has 4 divisors (see below), whose sum is σ = 518616. Its totient is φ = 172870.

The previous prime is 345739. The next prime is 345749. The reversal of 345742 is 247543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247543 = 73 ⋅3391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86434 + ... + 86437.

It is an arithmetic number, because the mean of its divisors is an integer number (129654).

2³⁴⁵⁷⁴² is an apocalyptic number.

345742 is a deficient number, since it is larger than the sum of its proper divisors (172874).

345742 is a wasteful number, since it uses less digits than its factorization.

345742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172873.

The product of its digits is 3360, while the sum is 25.

The square root of 345742 is about 587.9982993173. The cubic root of 345742 is about 70.1860357556.

It can be divided in two parts, 34 and 5742, that added together give a square (5776 = 76²).

The spelling of 345742 in words is "three hundred forty-five thousand, seven hundred forty-two".