1201646115 has 24 divisors (see below), whose sum is σ = 2084304768. Its totient is φ = 640431360.

The previous prime is 1201646107. The next prime is 1201646119. The reversal of 1201646115 is 5116461021.

1201646115 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 646 + 1 + 15 = 666.

It is not a de Polignac number, because 1201646115 - 2³ = 1201646107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201646119) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 61995 + ... + 79035.

It is an arithmetic number, because the mean of its divisors is an integer number (86846032).

Almost surely, 2^1201646115 is an apocalyptic number.

1201646115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1201646115 is a deficient number, since it is larger than the sum of its proper divisors (882658653).

1201646115 is a wasteful number, since it uses less digits than its factorization.

1201646115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18619 (or 18616 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1201646115 is about 34664.7676322805. The cubic root of 1201646115 is about 1063.1442522282.

The spelling of 1201646115 in words is "one billion, two hundred one million, six hundred forty-six thousand, one hundred fifteen".