1272565215 has 16 divisors (see below), whose sum is σ = 2262338400. Its totient is φ = 678701376.

The previous prime is 1272565201. The next prime is 1272565253. The reversal of 1272565215 is 5125652721.

1272565215 is a `hidden beast` number, since 1 + 2 + 72 + 565 + 21 + 5 = 666.

It is not a de Polignac number, because 1272565215 - 2⁹ = 1272564703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1272565215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4713070 + ... + 4713339.

It is an arithmetic number, because the mean of its divisors is an integer number (141396150).

Almost surely, 2^1272565215 is an apocalyptic number.

1272565215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1272565215 is a deficient number, since it is larger than the sum of its proper divisors (989773185).

1272565215 is an equidigital number, since it uses as much as digits as its factorization.

1272565215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426423 (or 9426417 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 1272565215 is about 35673.0320410251. The cubic root of 1272565215 is about 1083.6607641950.

The spelling of 1272565215 in words is "one billion, two hundred seventy-two million, five hundred sixty-five thousand, two hundred fifteen".