1311321450 has 48 divisors (see below), whose sum is σ = 3331411776. Its totient is φ = 341155200.

The previous prime is 1311321439. The next prime is 1311321457. The reversal of 1311321450 is 541231131.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1311321457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100462 + ... + 112761.

It is an arithmetic number, because the mean of its divisors is an integer number (69404412).

Almost surely, 2^1311321450 is an apocalyptic number.

1311321450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311321450 is an abundant number, since it is smaller than the sum of its proper divisors (2020090326).

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

1311321450 is a wasteful number, since it uses less digits than its factorization.

1311321450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213279 (or 213274 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1311321450 is about 36212.1726771537. The cubic root of 1311321450 is about 1094.5519736730.

Adding to 1311321450 its reverse (541231131), we get a palindrome (1852552581).

The spelling of 1311321450 in words is "one billion, three hundred eleven million, three hundred twenty-one thousand, four hundred fifty".