1272296540 has 24 divisors (see below), whose sum is σ = 2676477552. Its totient is φ = 508032000.

The previous prime is 1272296539. The next prime is 1272296549. The reversal of 1272296540 is 456922721.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1272296494 and 1272296503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272296549) 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 7 ways as a sum of consecutive naturals, for example, 43586 + ... + 66665.

It is an arithmetic number, because the mean of its divisors is an integer number (111519898).

Almost surely, 2^1272296540 is an apocalyptic number.

1272296540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272296540 is an abundant number, since it is smaller than the sum of its proper divisors (1404181012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1272296540 is a wasteful number, since it uses less digits than its factorization.

1272296540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110837 (or 110835 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1272296540 is about 35669.2660423508. The cubic root of 1272296540 is about 1083.5844948756.

The spelling of 1272296540 in words is "one billion, two hundred seventy-two million, two hundred ninety-six thousand, five hundred forty".