1272196999 has 16 divisors (see below), whose sum is σ = 1352908800. Its totient is φ = 1193692896.

The previous prime is 1272196997. The next prime is 1272197051. The reversal of 1272196999 is 9996912721.

It is a cyclic number.

It is not a de Polignac number, because 1272196999 - 2¹ = 1272196997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272196997) 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 15 ways as a sum of consecutive naturals, for example, 994042 + ... + 995320.

It is an arithmetic number, because the mean of its divisors is an integer number (84556800).

Almost surely, 2^1272196999 is an apocalyptic number.

1272196999 is a deficient number, since it is larger than the sum of its proper divisors (80711801).

1272196999 is a wasteful number, since it uses less digits than its factorization.

1272196999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094.

The product of its digits is 1102248, while the sum is 55.

The square root of 1272196999 is about 35667.8706821700. The cubic root of 1272196999 is about 1083.5562352433.

The spelling of 1272196999 in words is "one billion, two hundred seventy-two million, one hundred ninety-six thousand, nine hundred ninety-nine".