345042 has 24 divisors (see below), whose sum is σ = 774540. Its totient is φ = 110880.

The previous prime is 345041. The next prime is 345047. The reversal of 345042 is 240543.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 335241 + 9801 = 579^2 + 99^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (345041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192 + ... + 852.

2³⁴⁵⁰⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 345042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387270).

345042 is an abundant number, since it is smaller than the sum of its proper divisors (429498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

345042 is a wasteful number, since it uses less digits than its factorization.

345042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 345042 is about 587.4027579098. The cubic root of 345042 is about 70.1386368096.

Adding to 345042 its reverse (240543), we get a palindrome (585585).

The spelling of 345042 in words is "three hundred forty-five thousand, forty-two".