1156403201 has 4 divisors (see below), whose sum is σ = 1156478400. Its totient is φ = 1156328004.

The previous prime is 1156403191. The next prime is 1156403203. The reversal of 1156403201 is 1023046511.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1156403201 - 2³⁰ = 82661377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156403203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5261 + ... + 48378.

It is an arithmetic number, because the mean of its divisors is an integer number (289119600).

Almost surely, 2^1156403201 is an apocalyptic number.

It is an amenable number.

1156403201 is a deficient number, since it is larger than the sum of its proper divisors (75199).

1156403201 is an equidigital number, since it uses as much as digits as its factorization.

1156403201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75198.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1156403201 is about 34005.9289095299. The cubic root of 1156403201 is about 1049.6304673936.

Adding to 1156403201 its reverse (1023046511), we get a palindrome (2179449712).

The spelling of 1156403201 in words is "one billion, one hundred fifty-six million, four hundred three thousand, two hundred one".