1311402252 has 24 divisors (see below), whose sum is σ = 3064805632. Its totient is φ = 436438800.

The previous prime is 1311402251. The next prime is 1311402271. The reversal of 1311402252 is 2522041131.

It is not an unprimeable number, because it can be changed into a prime (1311402251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 79024 + ... + 94167.

Almost surely, 2^1311402252 is an apocalyptic number.

1311402252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311402252 is an abundant number, since it is smaller than the sum of its proper divisors (1753403380).

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

1311402252 is a wasteful number, since it uses less digits than its factorization.

1311402252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173829 (or 173827 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1311402252 is about 36213.2883345327. The cubic root of 1311402252 is about 1094.5744548559.

Adding to 1311402252 its reverse (2522041131), we get a palindrome (3833443383).

The spelling of 1311402252 in words is "one billion, three hundred eleven million, four hundred two thousand, two hundred fifty-two".