1272118290 has 32 divisors (see below), whose sum is σ = 3081101760. Its totient is φ = 336118464.

The previous prime is 1272118271. The next prime is 1272118291. The reversal of 1272118290 is 928112721.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1272118291) 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, 191244 + ... + 197783.

It is an arithmetic number, because the mean of its divisors is an integer number (96284430).

Almost surely, 2^1272118290 is an apocalyptic number.

1272118290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272118290 is an abundant number, since it is smaller than the sum of its proper divisors (1808983470).

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

1272118290 is a wasteful number, since it uses less digits than its factorization.

1272118290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389146.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1272118290 is about 35666.7673051540. The cubic root of 1272118290 is about 1083.5338887601.

The spelling of 1272118290 in words is "one billion, two hundred seventy-two million, one hundred eighteen thousand, two hundred ninety".