1149143 has 4 divisors (see below), whose sum is σ = 1168680. Its totient is φ = 1129608.

The previous prime is 1149131. The next prime is 1149151. The reversal of 1149143 is 3419411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3419411 = 19 ⋅179969.

It is a cyclic number.

It is not a de Polignac number, because 1149143 - 2¹⁸ = 886999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9680 + ... + 9797.

It is an arithmetic number, because the mean of its divisors is an integer number (292170).

2^1149143 is an apocalyptic number.

1149143 is a deficient number, since it is larger than the sum of its proper divisors (19537).

1149143 is an equidigital number, since it uses as much as digits as its factorization.

1149143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19536.

The product of its digits is 432, while the sum is 23.

The square root of 1149143 is about 1071.9808766951. The cubic root of 1149143 is about 104.7429236338.

The spelling of 1149143 in words is "one million, one hundred forty-nine thousand, one hundred forty-three".