345427 has 4 divisors (see below), whose sum is σ = 347200. Its totient is φ = 343656.

The previous prime is 345413. The next prime is 345431. The reversal of 345427 is 724543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724543 = 181 ⋅4003.

It is a cyclic number.

It is not a de Polignac number, because 345427 - 2¹¹ = 343379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345487) 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, 552 + ... + 997.

It is an arithmetic number, because the mean of its divisors is an integer number (86800).

2³⁴⁵⁴²⁷ is an apocalyptic number.

345427 is a deficient number, since it is larger than the sum of its proper divisors (1773).

345427 is a wasteful number, since it uses less digits than its factorization.

345427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its digits is 3360, while the sum is 25.

The square root of 345427 is about 587.7303803616. The cubic root of 345427 is about 70.1647141546.

It can be divided in two parts, 3454 and 27, that added together give a square (3481 = 59²).

The spelling of 345427 in words is "three hundred forty-five thousand, four hundred twenty-seven".