1209143 has 8 divisors (see below), whose sum is σ = 1310736. Its totient is φ = 1108800.

The previous prime is 1209139. The next prime is 1209151. The reversal of 1209143 is 3419021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1209143 - 2² = 1209139 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 (1209113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3488 + ... + 3818.

It is an arithmetic number, because the mean of its divisors is an integer number (163842).

2^1209143 is an apocalyptic number.

1209143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1209143 is a deficient number, since it is larger than the sum of its proper divisors (101593).

1209143 is a wasteful number, since it uses less digits than its factorization.

1209143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1209143 is about 1099.6103855457. The cubic root of 1209143 is about 106.5350601284.

The spelling of 1209143 in words is "one million, two hundred nine thousand, one hundred forty-three".