1286231 has 4 divisors (see below), whose sum is σ = 1321032. Its totient is φ = 1251432.

The previous prime is 1286227. The next prime is 1286239. The reversal of 1286231 is 1326821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1286231 - 2² = 1286227 is a prime.

It is a super-2 number, since 2×1286231² = 3308780370722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1286197 and 1286206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286239) 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, 17345 + ... + 17418.

It is an arithmetic number, because the mean of its divisors is an integer number (330258).

2^1286231 is an apocalyptic number.

1286231 is a deficient number, since it is larger than the sum of its proper divisors (34801).

1286231 is an equidigital number, since it uses as much as digits as its factorization.

1286231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34800.

The product of its digits is 576, while the sum is 23.

The square root of 1286231 is about 1134.1212457229. The cubic root of 1286231 is about 108.7526022190.

The spelling of 1286231 in words is "one million, two hundred eighty-six thousand, two hundred thirty-one".