1031200320 has 56 divisors (see below), whose sum is σ = 3274064064. Its totient is φ = 274986496.

The previous prime is 1031200271. The next prime is 1031200327. The reversal of 1031200320 is 230021301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1031200296 and 1031200305.

It is not an unprimeable number, because it can be changed into a prime (1031200327) 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, 536124 + ... + 538043.

Almost surely, 2^1031200320 is an apocalyptic number.

1031200320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031200320 is an abundant number, since it is smaller than the sum of its proper divisors (2242863744).

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

1031200320 is a wasteful number, since it uses less digits than its factorization.

1031200320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074187 (or 1074177 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1031200320 is about 32112.3079207957. The cubic root of 1031200320 is about 1010.2937811533.

Adding to 1031200320 its reverse (230021301), we get a palindrome (1261221621).

The spelling of 1031200320 in words is "one billion, thirty-one million, two hundred thousand, three hundred twenty".