1156556201 has 8 divisors (see below), whose sum is σ = 1220148000. Its totient is φ = 1093236480.

The previous prime is 1156556183. The next prime is 1156556227. The reversal of 1156556201 is 1026556511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156556201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156553201) 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, 59255 + ... + 76316.

It is an arithmetic number, because the mean of its divisors is an integer number (152518500).

Almost surely, 2^1156556201 is an apocalyptic number.

It is an amenable number.

1156556201 is a deficient number, since it is larger than the sum of its proper divisors (63591799).

1156556201 is a wasteful number, since it uses less digits than its factorization.

1156556201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136039.

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 1156556201 is about 34008.1784428393. The cubic root of 1156556201 is about 1049.6767564328.

The spelling of 1156556201 in words is "one billion, one hundred fifty-six million, five hundred fifty-six thousand, two hundred one".