345443121 has 12 divisors (see below), whose sum is σ = 499345860. Its totient is φ = 230123520.

The previous prime is 345443071. The next prime is 345443143. The reversal of 345443121 is 121344543.

It is a happy number.

345443121 is a `hidden beast` number, since 345 + 4 + 4 + 312 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 183873600 + 161569521 = 13560^2 + 12711^2 .

It is not a de Polignac number, because 345443121 - 2¹⁴ = 345426737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (345443821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 940 + ... + 26301.

It is an arithmetic number, because the mean of its divisors is an integer number (41612155).

Almost surely, 2^345443121 is an apocalyptic number.

It is an amenable number.

345443121 is a deficient number, since it is larger than the sum of its proper divisors (153902739).

345443121 is a wasteful number, since it uses less digits than its factorization.

345443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28656 (or 28653 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 345443121 is about 18586.1002095652. The cubic root of 345443121 is about 701.6580566144.

Adding to 345443121 its reverse (121344543), we get a palindrome (466787664).

The spelling of 345443121 in words is "three hundred forty-five million, four hundred forty-three thousand, one hundred twenty-one".