1272125507 has 4 divisors (see below), whose sum is σ = 1272265080. Its totient is φ = 1271985936.

The previous prime is 1272125501. The next prime is 1272125509. The reversal of 1272125507 is 7055212721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1272125507 - 2⁶ = 1272125443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272125501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55082 + ... + 74687.

It is an arithmetic number, because the mean of its divisors is an integer number (318066270).

Almost surely, 2^1272125507 is an apocalyptic number.

1272125507 is a deficient number, since it is larger than the sum of its proper divisors (139573).

1272125507 is an equidigital number, since it uses as much as digits as its factorization.

1272125507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139572.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 1272125507 is about 35666.8684776222. The cubic root of 1272125507 is about 1083.5359377963.

The spelling of 1272125507 in words is "one billion, two hundred seventy-two million, one hundred twenty-five thousand, five hundred seven".