345146421 has 4 divisors (see below), whose sum is σ = 460195232. Its totient is φ = 230097612.

The previous prime is 345146387. The next prime is 345146437. The reversal of 345146421 is 124641543.

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 345146421 - 2⁷ = 345146293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345146491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57524401 + ... + 57524406.

It is an arithmetic number, because the mean of its divisors is an integer number (115048808).

Almost surely, 2^345146421 is an apocalyptic number.

It is an amenable number.

345146421 is a deficient number, since it is larger than the sum of its proper divisors (115048811).

345146421 is a wasteful number, since it uses less digits than its factorization.

345146421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115048810.

The product of its digits is 11520, while the sum is 30.

The square root of 345146421 is about 18578.1167237156. The cubic root of 345146421 is about 701.4571151149.

Adding to 345146421 its reverse (124641543), we get a palindrome (469787964).

The spelling of 345146421 in words is "three hundred forty-five million, one hundred forty-six thousand, four hundred twenty-one".