11280143 has 12 divisors (see below), whose sum is σ = 13693680. Its totient is φ = 9247392.

The previous prime is 11280133. The next prime is 11280161. The reversal of 11280143 is 34108211.

It is not a de Polignac number, because 11280143 - 2²⁰ = 10231567 is a prime.

It is a super-2 number, since 2×11280143² = 254483252200898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11280133) 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 11 ways as a sum of consecutive naturals, for example, 3878 + ... + 6131.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^11280143 is an apocalyptic number.

11280143 is a deficient number, since it is larger than the sum of its proper divisors (2413537).

11280143 is a wasteful number, since it uses less digits than its factorization.

11280143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10046 (or 10039 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 11280143 is about 3358.5924134971. The cubic root of 11280143 is about 224.2701817966.

Adding to 11280143 its reverse (34108211), we get a palindrome (45388354).

It can be divided in two parts, 112 and 80143, that multiplied together give a square (8976016 = 2996²).

The spelling of 11280143 in words is "eleven million, two hundred eighty thousand, one hundred forty-three".