1321404450 has 48 divisors (see below), whose sum is σ = 3382807296. Its totient is φ = 341006400.

The previous prime is 1321404431. The next prime is 1321404499. The reversal of 1321404450 is 544041231.

It is a super-2 number, since 2×1321404450² = 3492219440959605000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1321404450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137437 + ... + 146736.

It is an arithmetic number, because the mean of its divisors is an integer number (70475152).

Almost surely, 2^1321404450 is an apocalyptic number.

1321404450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321404450 is an abundant number, since it is smaller than the sum of its proper divisors (2061402846).

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

1321404450 is a wasteful number, since it uses less digits than its factorization.

1321404450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284219 (or 284214 counting only the distinct ones).

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

The square root of 1321404450 is about 36351.1272177356. The cubic root of 1321404450 is about 1097.3502198900.

Adding to 1321404450 its reverse (544041231), we get a palindrome (1865445681).

The spelling of 1321404450 in words is "one billion, three hundred twenty-one million, four hundred four thousand, four hundred fifty".