345381121 has 4 divisors (see below), whose sum is σ = 345447252. Its totient is φ = 345314992.

The previous prime is 345381119. The next prime is 345381149. The reversal of 345381121 is 121183543.

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: 121183543 = 13 ⋅9321811.

It can be written as a sum of positive squares in 2 ways, for example, as 258052096 + 87329025 = 16064^2 + 9345^2 .

It is a cyclic number.

It is not a de Polignac number, because 345381121 - 2¹ = 345381119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345381121.

It is not an unprimeable number, because it can be changed into a prime (345381161) 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, 24490 + ... + 35923.

It is an arithmetic number, because the mean of its divisors is an integer number (86361813).

Almost surely, 2^345381121 is an apocalyptic number.

It is an amenable number.

345381121 is a deficient number, since it is larger than the sum of its proper divisors (66131).

345381121 is an equidigital number, since it uses as much as digits as its factorization.

345381121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66130.

The product of its digits is 2880, while the sum is 28.

The square root of 345381121 is about 18584.4322216203. The cubic root of 345381121 is about 701.6160763290.

The spelling of 345381121 in words is "three hundred forty-five million, three hundred eighty-one thousand, one hundred twenty-one".