340427 has 4 divisors (see below), whose sum is σ = 345576. Its totient is φ = 335280.

The previous prime is 340409. The next prime is 340429. The reversal of 340427 is 724043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724043 = 29 ⋅24967.

It is a cyclic number.

It is not a de Polignac number, because 340427 - 2¹⁸ = 78283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340399 and 340408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340427.

It is not an unprimeable number, because it can be changed into a prime (340429) 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, 2474 + ... + 2607.

It is an arithmetic number, because the mean of its divisors is an integer number (86394).

2³⁴⁰⁴²⁷ is an apocalyptic number.

340427 is a deficient number, since it is larger than the sum of its proper divisors (5149).

340427 is an equidigital number, since it uses as much as digits as its factorization.

340427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5148.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 340427 is about 583.4612240758. The cubic root of 340427 is about 69.8245264832.

It can be divided in two parts, 340 and 427, that added together give a palindrome (767).

The spelling of 340427 in words is "three hundred forty thousand, four hundred twenty-seven", and thus it is an iban number.