1200345331 has 4 divisors (see below), whose sum is σ = 1200425832. Its totient is φ = 1200264832.

The previous prime is 1200345329. The next prime is 1200345347. The reversal of 1200345331 is 1335430021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1335430021 = 317 ⋅4212713.

It is a cyclic number.

It is not a de Polignac number, because 1200345331 - 2¹ = 1200345329 is a prime.

It is a super-2 number, since 2×1200345331² = 2881657827306999122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200345371) 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 3 ways as a sum of consecutive naturals, for example, 10606 + ... + 50131.

It is an arithmetic number, because the mean of its divisors is an integer number (300106458).

Almost surely, 2^1200345331 is an apocalyptic number.

1200345331 is a deficient number, since it is larger than the sum of its proper divisors (80501).

1200345331 is an equidigital number, since it uses as much as digits as its factorization.

1200345331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80500.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1200345331 is about 34646.0002164752. Note that the first 3 decimals coincide. The cubic root of 1200345331 is about 1062.7604952244.

Adding to 1200345331 its reverse (1335430021), we get a palindrome (2535775352).

The spelling of 1200345331 in words is "one billion, two hundred million, three hundred forty-five thousand, three hundred thirty-one".