1272740120 has 64 divisors (see below), whose sum is σ = 2901420000. Its totient is φ = 502432768.

The previous prime is 1272740113. The next prime is 1272740129. The reversal of 1272740120 is 210472721.

It is a super-2 number, since 2×1272740120² = 3239734826115228800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1272740120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272740129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066244 + ... + 1067436.

Almost surely, 2^1272740120 is an apocalyptic number.

1272740120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272740120 is an abundant number, since it is smaller than the sum of its proper divisors (1628679880).

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

1272740120 is a wasteful number, since it uses less digits than its factorization.

1272740120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 1272740120 is about 35675.4834585321. The cubic root of 1272740120 is about 1083.7104090648.

The spelling of 1272740120 in words is "one billion, two hundred seventy-two million, seven hundred forty thousand, one hundred twenty".