1321450404 has 24 divisors (see below), whose sum is σ = 3084943680. Its totient is φ = 440260704.

The previous prime is 1321450393. The next prime is 1321450421. The reversal of 1321450404 is 4040541231.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2184 + ... + 51455.

It is an arithmetic number, because the mean of its divisors is an integer number (128539320).

Almost surely, 2^1321450404 is an apocalyptic number.

It is an amenable number.

1321450404 is an abundant number, since it is smaller than the sum of its proper divisors (1763493276).

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

1321450404 is a wasteful number, since it uses less digits than its factorization.

1321450404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55699 (or 55697 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1321450404 is about 36351.7592971785. The cubic root of 1321450404 is about 1097.3629404585.

Adding to 1321450404 its reverse (4040541231), we get a palindrome (5361991635).

It can be divided in two parts, 1321 and 450404, that added together give a triangular number (451725 = T₉₅₀).

The spelling of 1321450404 in words is "one billion, three hundred twenty-one million, four hundred fifty thousand, four hundred four".