345005421 has 8 divisors (see below), whose sum is σ = 460133184. Its totient is φ = 229940640.

The previous prime is 345005393. The next prime is 345005483. The reversal of 345005421 is 124500543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 345005421 - 2⁵ = 345005389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345005391 and 345005400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345005491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985 + ... + 26286.

It is an arithmetic number, because the mean of its divisors is an integer number (57516648).

Almost surely, 2^345005421 is an apocalyptic number.

It is an amenable number.

345005421 is a deficient number, since it is larger than the sum of its proper divisors (115127763).

345005421 is a wasteful number, since it uses less digits than its factorization.

345005421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31491.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 345005421 is about 18574.3215488480. The cubic root of 345005421 is about 701.3615818198.

Adding to 345005421 its reverse (124500543), we get a palindrome (469505964).

It can be divided in two parts, 34500542 and 1, that added together give a palindrome (34500543).

The spelling of 345005421 in words is "three hundred forty-five million, five thousand, four hundred twenty-one".