1155189401 has 8 divisors (see below), whose sum is σ = 1164021000. Its totient is φ = 1146372480.

The previous prime is 1155189377. The next prime is 1155189403. The reversal of 1155189401 is 1049815511.

It can be written as a sum of positive squares in 4 ways, for example, as 43033600 + 1112155801 = 6560^2 + 33349^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1155189401 - 2⁶ = 1155189337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155189403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193895 + ... + 199763.

It is an arithmetic number, because the mean of its divisors is an integer number (145502625).

Almost surely, 2^1155189401 is an apocalyptic number.

It is an amenable number.

1155189401 is a deficient number, since it is larger than the sum of its proper divisors (8831599).

1155189401 is a wasteful number, since it uses less digits than its factorization.

1155189401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339.

The product of its (nonzero) digits is 7200, while the sum is 35.

The square root of 1155189401 is about 33988.0773360306. The cubic root of 1155189401 is about 1049.2630962554.

The spelling of 1155189401 in words is "one billion, one hundred fifty-five million, one hundred eighty-nine thousand, four hundred one".