1266143 has 8 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 1173760.

The previous prime is 1266113. The next prime is 1266149. The reversal of 1266143 is 3416621.

It is a happy number.

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 1266143 - 2⁶ = 1266079 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 (1266149) 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 7 ways as a sum of consecutive naturals, for example, 683 + ... + 1731.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

2^1266143 is an apocalyptic number.

1266143 is a deficient number, since it is larger than the sum of its proper divisors (94657).

1266143 is a wasteful number, since it uses less digits than its factorization.

1266143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137.

The product of its digits is 864, while the sum is 23.

The square root of 1266143 is about 1125.2301986705. The cubic root of 1266143 is about 108.1834730003.

The spelling of 1266143 in words is "one million, two hundred sixty-six thousand, one hundred forty-three".