612045605 has 4 divisors (see below), whose sum is σ = 734454732. Its totient is φ = 489636480.

The previous prime is 612045593. The next prime is 612045659. The reversal of 612045605 is 506540216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 243328801 + 368716804 = 15599^2 + 19202^2 .

It is not a de Polignac number, because 612045605 - 2⁸ = 612045349 is a prime.

It is a Duffinian number.

It is a congruent 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, 61204556 + ... + 61204565.

It is an arithmetic number, because the mean of its divisors is an integer number (183613683).

Almost surely, 2^612045605 is an apocalyptic number.

It is an amenable number.

612045605 is a deficient number, since it is larger than the sum of its proper divisors (122409127).

612045605 is a wasteful number, since it uses less digits than its factorization.

612045605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122409126.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 612045605 is about 24739.5554729668. Note that the first 3 decimals coincide. The cubic root of 612045605 is about 849.0395633992.

The spelling of 612045605 in words is "six hundred twelve million, forty-five thousand, six hundred five".