1311230272 has 112 divisors (see below), whose sum is σ = 2960461440. Its totient is φ = 570931200.

The previous prime is 1311230269. The next prime is 1311230317. The reversal of 1311230272 is 2720321131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849054 + ... + 1849762.

Almost surely, 2^1311230272 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 1311230272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480230720).

1311230272 is an abundant number, since it is smaller than the sum of its proper divisors (1649231168).

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

1311230272 is a wasteful number, since it uses less digits than its factorization.

1311230272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1311230272 is about 36210.9137139620. The cubic root of 1311230272 is about 1094.5266045125.

The spelling of 1311230272 in words is "one billion, three hundred eleven million, two hundred thirty thousand, two hundred seventy-two".