1201155313 has 4 divisors (see below), whose sum is σ = 1208524528. Its totient is φ = 1193786100.

The previous prime is 1201155299. The next prime is 1201155317. The reversal of 1201155313 is 3135511021.

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 1201155313 - 2²⁵ = 1167600881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201155317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3684363 + ... + 3684688.

It is an arithmetic number, because the mean of its divisors is an integer number (302131132).

Almost surely, 2^1201155313 is an apocalyptic number.

It is an amenable number.

1201155313 is a deficient number, since it is larger than the sum of its proper divisors (7369215).

1201155313 is an equidigital number, since it uses as much as digits as its factorization.

1201155313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7369214.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1201155313 is about 34657.6876464660. The cubic root of 1201155313 is about 1062.9994884813. Note that the first 3 decimals are identical.

Adding to 1201155313 its reverse (3135511021), we get a palindrome (4336666334).

The spelling of 1201155313 in words is "one billion, two hundred one million, one hundred fifty-five thousand, three hundred thirteen".