1275139248 has 80 divisors (see below), whose sum is σ = 3473944320. Its totient is φ = 401925888.

The previous prime is 1275139219. The next prime is 1275139249. The reversal of 1275139248 is 8429315721.

It is not an unprimeable number, because it can be changed into a prime (1275139249) 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, 689461 + ... + 691307.

It is an arithmetic number, because the mean of its divisors is an integer number (43424304).

Almost surely, 2^1275139248 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 1275139248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736972160).

1275139248 is an abundant number, since it is smaller than the sum of its proper divisors (2198805072).

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

1275139248 is a wasteful number, since it uses less digits than its factorization.

1275139248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634 (or 2628 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 1275139248 is about 35709.0919514904. The cubic root of 1275139248 is about 1084.3909166834.

The spelling of 1275139248 in words is "one billion, two hundred seventy-five million, one hundred thirty-nine thousand, two hundred forty-eight".