345120515 has 4 divisors (see below), whose sum is σ = 414144624. Its totient is φ = 276096408.

The previous prime is 345120509. The next prime is 345120533. The reversal of 345120515 is 515021543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345120515 - 2⁴ = 345120499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34512047 + ... + 34512056.

It is an arithmetic number, because the mean of its divisors is an integer number (103536156).

Almost surely, 2^345120515 is an apocalyptic number.

345120515 is a deficient number, since it is larger than the sum of its proper divisors (69024109).

345120515 is an equidigital number, since it uses as much as digits as its factorization.

345120515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69024108.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 345120515 is about 18577.4194924914. The cubic root of 345120515 is about 701.4395646865.

The spelling of 345120515 in words is "three hundred forty-five million, one hundred twenty thousand, five hundred fifteen".