1321330134 has 64 divisors (see below), whose sum is σ = 2878675200. Its totient is φ = 402766848.

The previous prime is 1321330123. The next prime is 1321330139. The reversal of 1321330134 is 4310331231.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321330134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321330139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534369 + ... + 536835.

It is an arithmetic number, because the mean of its divisors is an integer number (44979300).

Almost surely, 2^1321330134 is an apocalyptic number.

1321330134 is an abundant number, since it is smaller than the sum of its proper divisors (1557345066).

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

1321330134 is a wasteful number, since it uses less digits than its factorization.

1321330134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1321330134 is about 36350.1050067259. The cubic root of 1321330134 is about 1097.3296477864.

Adding to 1321330134 its reverse (4310331231), we get a palindrome (5631661365).

The spelling of 1321330134 in words is "one billion, three hundred twenty-one million, three hundred thirty thousand, one hundred thirty-four".