1155646201 has 16 divisors (see below), whose sum is σ = 1249545600. Its totient is φ = 1065512448.

The previous prime is 1155646189. The next prime is 1155646211. The reversal of 1155646201 is 1026465511.

It is a cyclic number.

It is not a de Polignac number, because 1155646201 - 2²³ = 1147257593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155646211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571945 + ... + 573961.

It is an arithmetic number, because the mean of its divisors is an integer number (78096600).

Almost surely, 2^1155646201 is an apocalyptic number.

It is an amenable number.

1155646201 is a deficient number, since it is larger than the sum of its proper divisors (93899399).

1155646201 is a wasteful number, since it uses less digits than its factorization.

1155646201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1155646201 is about 33994.7966753737. The cubic root of 1155646201 is about 1049.4013824442.

The spelling of 1155646201 in words is "one billion, one hundred fifty-five million, six hundred forty-six thousand, two hundred one".