343745 has 4 divisors (see below), whose sum is σ = 412500. Its totient is φ = 274992.

The previous prime is 343727. The next prime is 343769. The reversal of 343745 is 547343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547343 = 59 ⋅9277.

It can be written as a sum of positive squares in 2 ways, for example, as 69169 + 274576 = 263^2 + 524^2 .

It is a cyclic number.

It is not a de Polignac number, because 343745 - 2⁸ = 343489 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34370 + ... + 34379.

It is an arithmetic number, because the mean of its divisors is an integer number (103125).

2³⁴³⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

343745 is a deficient number, since it is larger than the sum of its proper divisors (68755).

343745 is an equidigital number, since it uses as much as digits as its factorization.

343745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68754.

The product of its digits is 5040, while the sum is 26.

The square root of 343745 is about 586.2977059481. The cubic root of 343745 is about 70.0506436236.

The spelling of 343745 in words is "three hundred forty-three thousand, seven hundred forty-five".