342478 has 8 divisors (see below), whose sum is σ = 518760. Its totient is φ = 169560.

The previous prime is 342469. The next prime is 342481. The reversal of 342478 is 874243.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568 + ... + 1003.

It is an arithmetic number, because the mean of its divisors is an integer number (64845).

2³⁴²⁴⁷⁸ is an apocalyptic number.

342478 is a deficient number, since it is larger than the sum of its proper divisors (176282).

342478 is a wasteful number, since it uses less digits than its factorization.

342478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682.

The product of its digits is 5376, while the sum is 28.

The square root of 342478 is about 585.2161993657. The cubic root of 342478 is about 69.9644717667.

It can be divided in two parts, 342 and 478, that added together give a triangular number (820 = T₄₀).

The spelling of 342478 in words is "three hundred forty-two thousand, four hundred seventy-eight".