345857 has 8 divisors (see below), whose sum is σ = 369600. Its totient is φ = 322704.

The previous prime is 345853. The next prime is 345869. The reversal of 345857 is 758543.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345857 - 2² = 345853 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345857.

It is not an unprimeable number, because it can be changed into a prime (345853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1988 + ... + 2154.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2³⁴⁵⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

345857 is a deficient number, since it is larger than the sum of its proper divisors (23743).

345857 is a wasteful number, since it uses less digits than its factorization.

345857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its digits is 16800, while the sum is 32.

The square root of 345857 is about 588.0960805855. The cubic root of 345857 is about 70.1938166051.

Subtracting 345857 from its reverse (758543), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 345857 in words is "three hundred forty-five thousand, eight hundred fifty-seven".