345457 has 8 divisors (see below), whose sum is σ = 418176. Its totient is φ = 278592.

The previous prime is 345451. The next prime is 345461. The reversal of 345457 is 754543.

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 345457 - 2⁷ = 345329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1333 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (52272).

2³⁴⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

345457 is a deficient number, since it is larger than the sum of its proper divisors (72719).

345457 is a wasteful number, since it uses less digits than its factorization.

345457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927.

The product of its digits is 8400, while the sum is 28.

The square root of 345457 is about 587.7559017143. The cubic root of 345457 is about 70.1667453416.

It can be divided in two parts, 3454 and 57, that multiplied together give a triangular number (196878 = T₆₂₇).

The spelling of 345457 in words is "three hundred forty-five thousand, four hundred fifty-seven".