1272200180 has 12 divisors (see below), whose sum is σ = 2671620420. Its totient is φ = 508880064.

The previous prime is 1272200161. The next prime is 1272200191. The reversal of 1272200180 is 810022721.

It can be written as a sum of positive squares in 2 ways, for example, as 370639504 + 901560676 = 19252^2 + 30026^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31804985 + ... + 31805024.

It is an arithmetic number, because the mean of its divisors is an integer number (222635035).

Almost surely, 2^1272200180 is an apocalyptic number.

1272200180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272200180 is an abundant number, since it is smaller than the sum of its proper divisors (1399420240).

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

1272200180 is a wasteful number, since it uses less digits than its factorization.

1272200180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63610018 (or 63610016 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 1272200180 is about 35667.9152740947. The cubic root of 1272200180 is about 1083.5571383502.

The spelling of 1272200180 in words is "one billion, two hundred seventy-two million, two hundred thousand, one hundred eighty".