1286906 has 4 divisors (see below), whose sum is σ = 1930362. Its totient is φ = 643452.

The previous prime is 1286881. The next prime is 1286939. The reversal of 1286906 is 6096821.

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

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 43681 = 1115^2 + 209^2 .

It is a super-2 number, since 2×1286906² = 3312254105672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321725 + ... + 321728.

2^1286906 is an apocalyptic number.

1286906 is a deficient number, since it is larger than the sum of its proper divisors (643456).

1286906 is an equidigital number, since it uses as much as digits as its factorization.

1286906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643455.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1286906 is about 1134.4187939205. The cubic root of 1286906 is about 108.7716229519.

The spelling of 1286906 in words is "one million, two hundred eighty-six thousand, nine hundred six".