1272260520 has 288 divisors, whose sum is σ = 4568709600. Its totient is φ = 317540736.

The previous prime is 1272260519. The next prime is 1272260533. The reversal of 1272260520 is 250622721.

1272260520 is a `hidden beast` number, since 12 + 7 + 22 + 605 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15328399 + ... + 15328481.

It is an arithmetic number, because the mean of its divisors is an integer number (15863575).

Almost surely, 2^1272260520 is an apocalyptic number.

1272260520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272260520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2284354800).

1272260520 is an abundant number, since it is smaller than the sum of its proper divisors (3296449080).

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

1272260520 is an equidigital number, since it uses as much as digits as its factorization.

1272260520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1272260520 is about 35668.7611223042. The cubic root of 1272260520 is about 1083.5742689887.

The spelling of 1272260520 in words is "one billion, two hundred seventy-two million, two hundred sixty thousand, five hundred twenty".