1205106745 has 12 divisors (see below), whose sum is σ = 1497719340. Its totient is φ = 930837824.

The previous prime is 1205106737. The next prime is 1205106751. The reversal of 1205106745 is 5476015021.

It can be written as a sum of positive squares in 6 ways, for example, as 75272976 + 1129833769 = 8676^2 + 33613^2 .

It is not a de Polignac number, because 1205106745 - 2³ = 1205106737 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, 139090 + ... + 147499.

It is an arithmetic number, because the mean of its divisors is an integer number (124809945).

Almost surely, 2^1205106745 is an apocalyptic number.

It is an amenable number.

1205106745 is a deficient number, since it is larger than the sum of its proper divisors (292612595).

1205106745 is an equidigital number, since it uses as much as digits as its factorization.

1205106745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286652 (or 286623 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1205106745 is about 34714.6474128717. The cubic root of 1205106745 is about 1064.1638598641.

The spelling of 1205106745 in words is "one billion, two hundred five million, one hundred six thousand, seven hundred forty-five".