342757 has 2 divisors, whose sum is σ = 342758. Its totient is φ = 342756.

The previous prime is 342733. The next prime is 342761. The reversal of 342757 is 757243.

342757 is nontrivially palindromic in base 2.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312481 + 30276 = 559^2 + 174^2 .

It is an emirp because it is prime and its reverse (757243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 342757 - 2¹¹ = 340709 is a prime.

It is a super-2 number, since 2×342757² = 234964722098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342257) by changing a digit.

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 as a sum of consecutive naturals, namely, 171378 + 171379.

It is an arithmetic number, because the mean of its divisors is an integer number (171379).

2³⁴²⁷⁵⁷ is an apocalyptic number.

It is an amenable number.

342757 is a deficient number, since it is larger than the sum of its proper divisors (1).

342757 is an equidigital number, since it uses as much as digits as its factorization.

342757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 28.

The square root of 342757 is about 585.4545242801. The cubic root of 342757 is about 69.9834654825.

It can be divided in two parts, 3 and 42757, that multiplied together give a triangular number (128271 = T₅₀₆).

The spelling of 342757 in words is "three hundred forty-two thousand, seven hundred fifty-seven".