1311034420 has 12 divisors (see below), whose sum is σ = 2753172324. Its totient is φ = 524413760.

The previous prime is 1311034411. The next prime is 1311034427. The reversal of 1311034420 is 244301131.

It can be written as a sum of positive squares in 2 ways, for example, as 516471076 + 794563344 = 22726^2 + 28188^2 .

It is a super-2 number, since 2×1311034420² = 3437622500849472800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311034427) 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 3 ways as a sum of consecutive naturals, for example, 32775841 + ... + 32775880.

It is an arithmetic number, because the mean of its divisors is an integer number (229431027).

Almost surely, 2^1311034420 is an apocalyptic number.

1311034420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311034420 is an abundant number, since it is smaller than the sum of its proper divisors (1442137904).

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

1311034420 is a wasteful number, since it uses less digits than its factorization.

1311034420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65551730 (or 65551728 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1311034420 is about 36208.2092901596. The cubic root of 1311034420 is about 1094.4721071185.

Adding to 1311034420 its reverse (244301131), we get a palindrome (1555335551).

The spelling of 1311034420 in words is "one billion, three hundred eleven million, thirty-four thousand, four hundred twenty".