340542 has 12 divisors (see below), whose sum is σ = 737880. Its totient is φ = 113508.

The previous prime is 340541. The next prime is 340559. The reversal of 340542 is 245043.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 18919 = 340542 / (3 + 4 + 0 + 5 + 4 + 2).

It is a d-powerful number, because it can be written as 3⁴ + 4³ + 5⁷ + 0 + 4⁹ + 2⁷ .

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 340542.

It is not an unprimeable number, because it can be changed into a prime (340541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9442 + ... + 9477.

It is an arithmetic number, because the mean of its divisors is an integer number (61490).

2³⁴⁰⁵⁴² is an apocalyptic number.

340542 is an abundant number, since it is smaller than the sum of its proper divisors (397338).

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

340542 is a wasteful number, since it uses less digits than its factorization.

340542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18927 (or 18924 counting only the distinct ones).

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

The square root of 340542 is about 583.5597655768. The cubic root of 340542 is about 69.8323880967.

Adding to 340542 its reverse (245043), we get a palindrome (585585).

The spelling of 340542 in words is "three hundred forty thousand, five hundred forty-two".