1321401330 has 64 divisors (see below), whose sum is σ = 3731028480. Its totient is φ = 331644672.

The previous prime is 1321401329. The next prime is 1321401343. The reversal of 1321401330 is 331041231.

It is a super-2 number, since 2×1321401330² = 3492202949851537800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139354 + ... + 148533.

It is an arithmetic number, because the mean of its divisors is an integer number (58297320).

Almost surely, 2^1321401330 is an apocalyptic number.

1321401330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321401330 is an abundant number, since it is smaller than the sum of its proper divisors (2409627150).

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

1321401330 is a wasteful number, since it uses less digits than its factorization.

1321401330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287920 (or 287914 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1321401330 is about 36351.0843029476. The cubic root of 1321401330 is about 1097.3493562293.

Adding to 1321401330 its reverse (331041231), we get a palindrome (1652442561).

The spelling of 1321401330 in words is "one billion, three hundred twenty-one million, four hundred one thousand, three hundred thirty".