1280086 has 4 divisors (see below), whose sum is σ = 1920132. Its totient is φ = 640042.

The previous prime is 1280023. The next prime is 1280101. The reversal of 1280086 is 6800821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1280086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320020 + ... + 320023.

It is an arithmetic number, because the mean of its divisors is an integer number (480033).

2^1280086 is an apocalyptic number.

1280086 is a deficient number, since it is larger than the sum of its proper divisors (640046).

1280086 is an equidigital number, since it uses as much as digits as its factorization.

1280086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640045.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1280086 is about 1131.4088562496. The cubic root of 1280086 is about 108.5791362751.

The spelling of 1280086 in words is "one million, two hundred eighty thousand, eighty-six".