345120505 has 8 divisors (see below), whose sum is σ = 416925000. Its totient is φ = 274242816.

The previous prime is 345120499. The next prime is 345120509. The reversal of 345120505 is 505021543.

It can be written as a sum of positive squares in 4 ways, for example, as 2611456 + 342509049 = 1616^2 + 18507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345120505 - 2⁵ = 345120473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345120505.

It is not an unprimeable number, because it can be changed into a prime (345120509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230880 + ... + 232369.

It is an arithmetic number, because the mean of its divisors is an integer number (52115625).

Almost surely, 2^345120505 is an apocalyptic number.

It is an amenable number.

345120505 is a deficient number, since it is larger than the sum of its proper divisors (71804495).

345120505 is a wasteful number, since it uses less digits than its factorization.

345120505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463403.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 345120505 is about 18577.4192233475. The cubic root of 345120505 is about 701.4395579116.

The spelling of 345120505 in words is "three hundred forty-five million, one hundred twenty thousand, five hundred five".