1321200433 has 8 divisors (see below), whose sum is σ = 1520078400. Its totient is φ = 1124856240.

The previous prime is 1321200401. The next prime is 1321200451. The reversal of 1321200433 is 3340021231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321200433 - 2⁵ = 1321200401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321200433.

It is not an unprimeable number, because it can be changed into a prime (1321201433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632323 + ... + 634408.

It is an arithmetic number, because the mean of its divisors is an integer number (190009800).

Almost surely, 2^1321200433 is an apocalyptic number.

It is an amenable number.

1321200433 is a deficient number, since it is larger than the sum of its proper divisors (198877967).

1321200433 is a wasteful number, since it uses less digits than its factorization.

1321200433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266887.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1321200433 is about 36348.3209103254. The cubic root of 1321200433 is about 1097.2937421975.

Adding to 1321200433 its reverse (3340021231), we get a palindrome (4661221664).

The spelling of 1321200433 in words is "one billion, three hundred twenty-one million, two hundred thousand, four hundred thirty-three".