1286205 has 16 divisors (see below), whose sum is σ = 2166720. Its totient is φ = 649728.

The previous prime is 1286191. The next prime is 1286209. The reversal of 1286205 is 5026821.

It is not a de Polignac number, because 1286205 - 2⁴ = 1286189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1972 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (135420).

2^1286205 is an apocalyptic number.

1286205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1286205 is a deficient number, since it is larger than the sum of its proper divisors (880515).

1286205 is a wasteful number, since it uses less digits than its factorization.

1286205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1286205 is about 1134.1097830457. The cubic root of 1286205 is about 108.7518694354.

The spelling of 1286205 in words is "one million, two hundred eighty-six thousand, two hundred five".