1286243 has 12 divisors (see below), whose sum is σ = 1554480. Its totient is φ = 1042416.

The previous prime is 1286239. The next prime is 1286261. The reversal of 1286243 is 3426821.

It is not a de Polignac number, because 1286243 - 2² = 1286239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2273 + ... + 2781.

It is an arithmetic number, because the mean of its divisors is an integer number (129540).

2^1286243 is an apocalyptic number.

1286243 is a deficient number, since it is larger than the sum of its proper divisors (268237).

1286243 is an equidigital number, since it uses as much as digits as its factorization.

1286243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 535 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 1286243 is about 1134.1265361502. The cubic root of 1286243 is about 108.7529404234.

The spelling of 1286243 in words is "one million, two hundred eighty-six thousand, two hundred forty-three".