1155040203 has 8 divisors (see below), whose sum is σ = 1544624848. Its totient is φ = 767741184.

The previous prime is 1155040193. The next prime is 1155040213. The reversal of 1155040203 is 3020405511.

It is an interprime number because it is at equal distance from previous prime (1155040193) and next prime (1155040213).

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

It is not a de Polignac number, because 1155040203 - 2⁵ = 1155040171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155040203.

It is not an unprimeable number, because it can be changed into a prime (1155040213) 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, 570226 + ... + 572247.

It is an arithmetic number, because the mean of its divisors is an integer number (193078106).

Almost surely, 2^1155040203 is an apocalyptic number.

1155040203 is a deficient number, since it is larger than the sum of its proper divisors (389584645).

1155040203 is a wasteful number, since it uses less digits than its factorization.

1155040203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142813.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1155040203 is about 33985.8824072585. The cubic root of 1155040203 is about 1049.2179219329.

Adding to 1155040203 its reverse (3020405511), we get a palindrome (4175445714).

The spelling of 1155040203 in words is "one billion, one hundred fifty-five million, forty thousand, two hundred three".