347421 has 4 divisors (see below), whose sum is σ = 463232. Its totient is φ = 231612.

The previous prime is 347411. The next prime is 347437. The reversal of 347421 is 124743.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 347421 - 2¹⁰ = 346397 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 4⁸ + 4⁹ + 7² + 2³ + 1 .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 347421.

It is not an unprimeable number, because it can be changed into a prime (347401) 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, 57901 + ... + 57906.

It is an arithmetic number, because the mean of its divisors is an integer number (115808).

2³⁴⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

347421 is a deficient number, since it is larger than the sum of its proper divisors (115811).

347421 is a wasteful number, since it uses less digits than its factorization.

347421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115810.

The product of its digits is 672, while the sum is 21.

The square root of 347421 is about 589.4242953934. The cubic root of 347421 is about 70.2994653368.

It can be divided in two parts, 34742 and 1, that added together give a palindrome (34743).

The spelling of 347421 in words is "three hundred forty-seven thousand, four hundred twenty-one", and thus it is an iban number.