342557 has 4 divisors (see below), whose sum is σ = 343740. Its totient is φ = 341376.

The previous prime is 342553. The next prime is 342569. The reversal of 342557 is 755243.

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, and also an emirpimes, since its reverse is a distinct semiprime: 755243 = 47 ⋅16069.

It can be written as a sum of positive squares in 2 ways, for example, as 198916 + 143641 = 446^2 + 379^2 .

It is a cyclic number.

It is not a de Polignac number, because 342557 - 2² = 342553 is a prime.

It is a Duffinian number.

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 342557.

It is not an unprimeable number, because it can be changed into a prime (342553) 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, 173 + ... + 845.

It is an arithmetic number, because the mean of its divisors is an integer number (85935).

2³⁴²⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

342557 is a deficient number, since it is larger than the sum of its proper divisors (1183).

342557 is an equidigital number, since it uses as much as digits as its factorization.

342557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its digits is 4200, while the sum is 26.

The square root of 342557 is about 585.2836918965. The cubic root of 342557 is about 69.9698509622.

Subtracting 342557 from its reverse (755243), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 342557 in words is "three hundred forty-two thousand, five hundred fifty-seven".