1143671 has 4 divisors (see below), whose sum is σ = 1170312. Its totient is φ = 1117032.

The previous prime is 1143661. The next prime is 1143679. The reversal of 1143671 is 1763411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1763411 = 13 ⋅135647.

It is a cyclic number.

It is not a de Polignac number, because 1143671 - 2¹⁸ = 881527 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 (1143679) 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, 13256 + ... + 13341.

It is an arithmetic number, because the mean of its divisors is an integer number (292578).

2^1143671 is an apocalyptic number.

1143671 is a deficient number, since it is larger than the sum of its proper divisors (26641).

1143671 is an equidigital number, since it uses as much as digits as its factorization.

1143671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26640.

The product of its digits is 504, while the sum is 23.

The square root of 1143671 is about 1069.4255467306. The cubic root of 1143671 is about 104.5764037602.

The spelling of 1143671 in words is "one million, one hundred forty-three thousand, six hundred seventy-one".