1286138 has 8 divisors (see below), whose sum is σ = 2204832. Its totient is φ = 551196.

The previous prime is 1286119. The next prime is 1286147. The reversal of 1286138 is 8316821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1286138.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45920 + ... + 45947.

It is an arithmetic number, because the mean of its divisors is an integer number (275604).

2^1286138 is an apocalyptic number.

1286138 is a deficient number, since it is larger than the sum of its proper divisors (918694).

1286138 is an equidigital number, since it uses as much as digits as its factorization.

1286138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91876.

The product of its digits is 2304, while the sum is 29.

The square root of 1286138 is about 1134.0802440745. The cubic root of 1286138 is about 108.7499810631.

The spelling of 1286138 in words is "one million, two hundred eighty-six thousand, one hundred thirty-eight".