612505305 has 12 divisors (see below), whose sum is σ = 1061675940. Its totient is φ = 326669472.

The previous prime is 612505253. The next prime is 612505319. The reversal of 612505305 is 503505216.

612505305 is a `hidden beast` number, since 6 + 125 + 0 + 530 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 77369616 + 535135689 = 8796^2 + 23133^2 .

It is not a de Polignac number, because 612505305 - 2⁶ = 612505241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6805570 + ... + 6805659.

It is an arithmetic number, because the mean of its divisors is an integer number (88472995).

Almost surely, 2^612505305 is an apocalyptic number.

It is an amenable number.

612505305 is a deficient number, since it is larger than the sum of its proper divisors (449170635).

612505305 is a wasteful number, since it uses less digits than its factorization.

612505305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611240 (or 13611237 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 612505305 is about 24748.8445184821. The cubic root of 612505305 is about 849.2520779610.

The spelling of 612505305 in words is "six hundred twelve million, five hundred five thousand, three hundred five".