1231200464 has 80 divisors (see below), whose sum is σ = 2686494720. Its totient is φ = 542730240.

The previous prime is 1231200449. The next prime is 1231200473. The reversal of 1231200464 is 4640021321.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 508184 + ... + 510600.

It is an arithmetic number, because the mean of its divisors is an integer number (33581184).

Almost surely, 2^1231200464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231200464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343247360).

1231200464 is an abundant number, since it is smaller than the sum of its proper divisors (1455294256).

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

1231200464 is a wasteful number, since it uses less digits than its factorization.

1231200464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1231200464 is about 35088.4662531721. The cubic root of 1231200464 is about 1071.7897272659.

Adding to 1231200464 its reverse (4640021321), we get a palindrome (5871221785).

The spelling of 1231200464 in words is "one billion, two hundred thirty-one million, two hundred thousand, four hundred sixty-four".