1206605145 has 8 divisors (see below), whose sum is σ = 1930568256. Its totient is φ = 643522736.

The previous prime is 1206605137. The next prime is 1206605159. The reversal of 1206605145 is 5415066021.

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 1206605145 - 2³ = 1206605137 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40220157 + ... + 40220186.

It is an arithmetic number, because the mean of its divisors is an integer number (241321032).

Almost surely, 2^1206605145 is an apocalyptic number.

1206605145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206605145 is a deficient number, since it is larger than the sum of its proper divisors (723963111).

1206605145 is an equidigital number, since it uses as much as digits as its factorization.

1206605145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80440351.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1206605145 is about 34736.2223766488. Note that the first 3 decimals coincide. The cubic root of 1206605145 is about 1064.6047288905.

The spelling of 1206605145 in words is "one billion, two hundred six million, six hundred five thousand, one hundred forty-five".