1143172201 has 4 divisors (see below), whose sum is σ = 1143271504. Its totient is φ = 1143072900.

The previous prime is 1143172193. The next prime is 1143172229. The reversal of 1143172201 is 1022713411.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1022713411 = 37 ⋅27640903.

It is a cyclic number.

It is not a de Polignac number, because 1143172201 - 2³ = 1143172193 is a prime.

It is a super-2 number, since 2×1143172201² = 2613685362278368802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143172231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29715 + ... + 56296.

It is an arithmetic number, because the mean of its divisors is an integer number (285817876).

Almost surely, 2^1143172201 is an apocalyptic number.

It is an amenable number.

1143172201 is a deficient number, since it is larger than the sum of its proper divisors (99303).

1143172201 is an equidigital number, since it uses as much as digits as its factorization.

1143172201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99302.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1143172201 is about 33810.8296408118. The cubic root of 1143172201 is about 1045.6119828274.

Adding to 1143172201 its reverse (1022713411), we get a palindrome (2165885612).

The spelling of 1143172201 in words is "one billion, one hundred forty-three million, one hundred seventy-two thousand, two hundred one".