342787 has 4 divisors (see below), whose sum is σ = 344080. Its totient is φ = 341496.

The previous prime is 342761. The next prime is 342791. The reversal of 342787 is 787243.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 342787 - 2⁷ = 342659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87 + ... + 832.

It is an arithmetic number, because the mean of its divisors is an integer number (86020).

2³⁴²⁷⁸⁷ is an apocalyptic number.

342787 is a deficient number, since it is larger than the sum of its proper divisors (1293).

342787 is an equidigital number, since it uses as much as digits as its factorization.

342787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292.

The product of its digits is 9408, while the sum is 31.

The square root of 342787 is about 585.4801448384. The cubic root of 342787 is about 69.9855072037.

The spelling of 342787 in words is "three hundred forty-two thousand, seven hundred eighty-seven".