1200312144 has 60 divisors (see below), whose sum is σ = 3393877396. Its totient is φ = 395974656.

The previous prime is 1200312143. The next prime is 1200312151. The reversal of 1200312144 is 4412130021.

It can be written as a sum of positive squares in 2 ways, for example, as 653313600 + 546998544 = 25560^2 + 23388^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200312143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28999 + ... + 56934.

Almost surely, 2^1200312144 is an apocalyptic number.

It is an amenable number.

1200312144 is an abundant number, since it is smaller than the sum of its proper divisors (2193565252).

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

1200312144 is a wasteful number, since it uses less digits than its factorization.

1200312144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86044 (or 86035 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1200312144 is about 34645.5212689894. The cubic root of 1200312144 is about 1062.7507007770.

Adding to 1200312144 its reverse (4412130021), we get a palindrome (5612442165).

The spelling of 1200312144 in words is "one billion, two hundred million, three hundred twelve thousand, one hundred forty-four".