342485257 has 4 divisors (see below), whose sum is σ = 342524160. Its totient is φ = 342446356.

The previous prime is 342485237. The next prime is 342485263. The reversal of 342485257 is 752584243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 342485257 - 2²³ = 334096649 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342485207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 744 + ... + 26182.

It is an arithmetic number, because the mean of its divisors is an integer number (85631040).

Almost surely, 2^342485257 is an apocalyptic number.

It is an amenable number.

342485257 is a deficient number, since it is larger than the sum of its proper divisors (38903).

342485257 is a wasteful number, since it uses less digits than its factorization.

342485257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38902.

The product of its digits is 268800, while the sum is 40.

The square root of 342485257 is about 18506.3572050255. The cubic root of 342485257 is about 699.6496593823.

The spelling of 342485257 in words is "three hundred forty-two million, four hundred eighty-five thousand, two hundred fifty-seven".