1200454221 has 8 divisors (see below), whose sum is σ = 1605720640. Its totient is φ = 797745312.

The previous prime is 1200454207. The next prime is 1200454223. The reversal of 1200454221 is 1224540021.

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

It is not a de Polignac number, because 1200454221 - 2²² = 1196259917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200454223) 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 7 ways as a sum of consecutive naturals, for example, 638281 + ... + 640158.

It is an arithmetic number, because the mean of its divisors is an integer number (200715080).

Almost surely, 2^1200454221 is an apocalyptic number.

It is an amenable number.

1200454221 is a deficient number, since it is larger than the sum of its proper divisors (405266419).

1200454221 is a wasteful number, since it uses less digits than its factorization.

1200454221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278755.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1200454221 is about 34647.5716465094. The cubic root of 1200454221 is about 1062.7926305575.

Adding to 1200454221 its reverse (1224540021), we get a palindrome (2424994242).

The spelling of 1200454221 in words is "one billion, two hundred million, four hundred fifty-four thousand, two hundred twenty-one".