1200455313 has 4 divisors (see below), whose sum is σ = 1600607088. Its totient is φ = 800303540.

The previous prime is 1200455299. The next prime is 1200455317. The reversal of 1200455313 is 3135540021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200455313 - 2⁴ = 1200455297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200455317) 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, 200075883 + ... + 200075888.

It is an arithmetic number, because the mean of its divisors is an integer number (400151772).

Almost surely, 2^1200455313 is an apocalyptic number.

It is an amenable number.

1200455313 is a deficient number, since it is larger than the sum of its proper divisors (400151775).

1200455313 is an equidigital number, since it uses as much as digits as its factorization.

1200455313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400151774.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1200455313 is about 34647.5874051859. The cubic root of 1200455313 is about 1062.7929528158.

Adding to 1200455313 its reverse (3135540021), we get a palindrome (4335995334).

The spelling of 1200455313 in words is "one billion, two hundred million, four hundred fifty-five thousand, three hundred thirteen".