340457 has 4 divisors (see below), whose sum is σ = 366660. Its totient is φ = 314256.

The previous prime is 340453. The next prime is 340477. The reversal of 340457 is 754043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163216 + 177241 = 404^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 340457 - 2² = 340453 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 340457.

It is not an unprimeable number, because it can be changed into a prime (340451) 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, 13082 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (91665).

2³⁴⁰⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

340457 is a deficient number, since it is larger than the sum of its proper divisors (26203).

340457 is a wasteful number, since it uses less digits than its factorization.

340457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26202.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 340457 is about 583.4869321587. The cubic root of 340457 is about 69.8265775095.

It can be divided in two parts, 340 and 457, that added together give a palindrome (797).

The spelling of 340457 in words is "three hundred forty thousand, four hundred fifty-seven".