345215121 has 16 divisors (see below), whose sum is σ = 472506048. Its totient is φ = 224057600.

The previous prime is 345215093. The next prime is 345215147. The reversal of 345215121 is 121512543.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 345215121 - 2⁵ = 345215089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345215091 and 345215100.

It is not an unprimeable number, because it can be changed into a prime (345215621) 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 15 ways as a sum of consecutive naturals, for example, 61390 + ... + 66776.

It is an arithmetic number, because the mean of its divisors is an integer number (29531628).

Almost surely, 2^345215121 is an apocalyptic number.

It is an amenable number.

345215121 is a deficient number, since it is larger than the sum of its proper divisors (127290927).

345215121 is a wasteful number, since it uses less digits than its factorization.

345215121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952.

The product of its digits is 1200, while the sum is 24.

The square root of 345215121 is about 18579.9655812383. The cubic root of 345215121 is about 701.5036527618.

Adding to 345215121 its reverse (121512543), we get a palindrome (466727664).

The spelling of 345215121 in words is "three hundred forty-five million, two hundred fifteen thousand, one hundred twenty-one".