1172143 has 4 divisors (see below), whose sum is σ = 1339600. Its totient is φ = 1004688.

The previous prime is 1172111. The next prime is 1172147. The reversal of 1172143 is 3412711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3412711 = 83 ⋅41117.

It is a cyclic number.

It is not a de Polignac number, because 1172143 - 2⁵ = 1172111 is a prime.

It is an Ulam number.

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 1172143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172147) 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, 83718 + ... + 83731.

It is an arithmetic number, because the mean of its divisors is an integer number (334900).

2^1172143 is an apocalyptic number.

1172143 is a deficient number, since it is larger than the sum of its proper divisors (167457).

1172143 is an equidigital number, since it uses as much as digits as its factorization.

1172143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167456.

The product of its digits is 168, while the sum is 19.

The square root of 1172143 is about 1082.6555315519. The cubic root of 1172143 is about 105.4371195263.

Adding to 1172143 its reverse (3412711), we get a palindrome (4584854).

The spelling of 1172143 in words is "one million, one hundred seventy-two thousand, one hundred forty-three".