342487 has 4 divisors (see below), whose sum is σ = 344160. Its totient is φ = 340816.

The previous prime is 342481. The next prime is 342497. The reversal of 342487 is 784243.

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

It is a cyclic number.

It is not a de Polignac number, because 342487 - 2⁷ = 342359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342481) 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, 478 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (86040).

2³⁴²⁴⁸⁷ is an apocalyptic number.

342487 is the 478-th pentagonal number.

342487 is a deficient number, since it is larger than the sum of its proper divisors (1673).

342487 is a wasteful number, since it uses less digits than its factorization.

342487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

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

The square root of 342487 is about 585.2238887810. The cubic root of 342487 is about 69.9650846282.

The spelling of 342487 in words is "three hundred forty-two thousand, four hundred eighty-seven".