1201986906 has 16 divisors (see below), whose sum is σ = 2407720224. Its totient is φ = 400037904.

The previous prime is 1201986871. The next prime is 1201986917. The reversal of 1201986906 is 6096891021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151921 + ... + 159636.

It is an arithmetic number, because the mean of its divisors is an integer number (150482514).

Almost surely, 2^1201986906 is an apocalyptic number.

1201986906 is an abundant number, since it is smaller than the sum of its proper divisors (1205733318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201986906 is a wasteful number, since it uses less digits than its factorization.

1201986906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312205.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1201986906 is about 34669.6828078943. The cubic root of 1201986906 is about 1063.2447465259.

The spelling of 1201986906 in words is "one billion, two hundred one million, nine hundred eighty-six thousand, nine hundred six".