1272205953 has 16 divisors (see below), whose sum is σ = 1889512960. Its totient is φ = 845993808.

The previous prime is 1272205939. The next prime is 1272206003. The reversal of 1272205953 is 3595022721.

It is not a de Polignac number, because 1272205953 - 2⁴ = 1272205937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272205853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48625 + ... + 70062.

It is an arithmetic number, because the mean of its divisors is an integer number (118094560).

Almost surely, 2^1272205953 is an apocalyptic number.

It is an amenable number.

1272205953 is a deficient number, since it is larger than the sum of its proper divisors (617307007).

1272205953 is a wasteful number, since it uses less digits than its factorization.

1272205953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119093 (or 119087 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 1272205953 is about 35667.9962010764. The cubic root of 1272205953 is about 1083.5587773391.

The spelling of 1272205953 in words is "one billion, two hundred seventy-two million, two hundred five thousand, nine hundred fifty-three".