345442 has 4 divisors (see below), whose sum is σ = 518166. Its totient is φ = 172720.

The previous prime is 345431. The next prime is 345451. The reversal of 345442 is 244543.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 335241 + 10201 = 579^2 + 101^2 .

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 plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345442.

It is an unprimeable number.

345442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86359 + ... + 86362.

2³⁴⁵⁴⁴² is an apocalyptic number.

345442 is a deficient number, since it is larger than the sum of its proper divisors (172724).

345442 is a wasteful number, since it uses less digits than its factorization.

345442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172723.

The product of its digits is 1920, while the sum is 22.

The square root of 345442 is about 587.7431411765. The cubic root of 345442 is about 70.1657297628.

Adding to 345442 its reverse (244543), we get a palindrome (589985).

It can be divided in two parts, 345 and 442, that added together give a palindrome (787).

The spelling of 345442 in words is "three hundred forty-five thousand, four hundred forty-two".