1272240015 has 16 divisors (see below), whose sum is σ = 2040049248. Its totient is φ = 677039616.

The previous prime is 1272240001. The next prime is 1272240049. The reversal of 1272240015 is 5100422721.

It is not a de Polignac number, because 1272240015 - 2¹⁰ = 1272238991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85942 + ... + 99651.

It is an arithmetic number, because the mean of its divisors is an integer number (127503078).

Almost surely, 2^1272240015 is an apocalyptic number.

1272240015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1272240015 is a deficient number, since it is larger than the sum of its proper divisors (767809233).

1272240015 is a wasteful number, since it uses less digits than its factorization.

1272240015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186058.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 1272240015 is about 35668.4736847542. The cubic root of 1272240015 is about 1083.5684476417.

Adding to 1272240015 its reverse (5100422721), we get a palindrome (6372662736).

The spelling of 1272240015 in words is "one billion, two hundred seventy-two million, two hundred forty thousand, fifteen".