1272550916 has 96 divisors (see below), whose sum is σ = 2963708160. Its totient is φ = 463947264.

The previous prime is 1272550913. The next prime is 1272550921. The reversal of 1272550916 is 6190552721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 1272550916.

It is not an unprimeable number, because it can be changed into a prime (1272550913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253406 + ... + 258378.

It is an arithmetic number, because the mean of its divisors is an integer number (30871960).

Almost surely, 2^1272550916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272550916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481854080).

1272550916 is an abundant number, since it is smaller than the sum of its proper divisors (1691157244).

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

1272550916 is a wasteful number, since it uses less digits than its factorization.

1272550916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5053 (or 5051 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 1272550916 is about 35672.8316229592. The cubic root of 1272550916 is about 1083.6567053793.

The spelling of 1272550916 in words is "one billion, two hundred seventy-two million, five hundred fifty thousand, nine hundred sixteen".