1200001995 has 12 divisors (see below), whose sum is σ = 2080003536. Its totient is φ = 640001040.

The previous prime is 1200001987. The next prime is 1200002017. The reversal of 1200001995 is 5991000021.

It is a happy number.

1200001995 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1200001995 - 2³ = 1200001987 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, 13333311 + ... + 13333400.

It is an arithmetic number, because the mean of its divisors is an integer number (173333628).

Almost surely, 2^1200001995 is an apocalyptic number.

1200001995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200001995 is a deficient number, since it is larger than the sum of its proper divisors (880001541).

1200001995 is a wasteful number, since it uses less digits than its factorization.

1200001995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26666722 (or 26666719 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1200001995 is about 34641.0449467103. The cubic root of 1200001995 is about 1062.6591580722.

The spelling of 1200001995 in words is "one billion, two hundred million, one thousand, nine hundred ninety-five".