1275238272 has 512 divisors, whose sum is σ = 4653158400. Its totient is φ = 299335680.

The previous prime is 1275238253. The next prime is 1275238319. The reversal of 1275238272 is 2728325721.

It is a self number, because there is not a number n which added to its sum of digits gives 1275238272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21614179 + ... + 21614237.

It is an arithmetic number, because the mean of its divisors is an integer number (9088200).

Almost surely, 2^1275238272 is an apocalyptic number.

1275238272 is a gapful number since it is divisible by the number (12) 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 1275238272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2326579200).

1275238272 is an abundant number, since it is smaller than the sum of its proper divisors (3377920128).

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

1275238272 is a wasteful number, since it uses less digits than its factorization.

1275238272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 142 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 1275238272 is about 35710.4784622105. The cubic root of 1275238272 is about 1084.4189862836.

The spelling of 1275238272 in words is "one billion, two hundred seventy-five million, two hundred thirty-eight thousand, two hundred seventy-two".