1201206009 has 16 divisors (see below), whose sum is σ = 1696697280. Its totient is φ = 753308160.

The previous prime is 1201206007. The next prime is 1201206031. The reversal of 1201206009 is 9006021021.

It is not a de Polignac number, because 1201206009 - 2¹ = 1201206007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201206007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118077 + ... + 127845.

It is an arithmetic number, because the mean of its divisors is an integer number (106043580).

Almost surely, 2^1201206009 is an apocalyptic number.

It is an amenable number.

1201206009 is a deficient number, since it is larger than the sum of its proper divisors (495491271).

1201206009 is a wasteful number, since it uses less digits than its factorization.

1201206009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12200.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1201206009 is about 34658.4190204920. The cubic root of 1201206009 is about 1063.0144432678.

The spelling of 1201206009 in words is "one billion, two hundred one million, two hundred six thousand, nine".