1286522 has 12 divisors (see below), whose sum is σ = 1975470. Its totient is φ = 628368.

The previous prime is 1286521. The next prime is 1286533. The reversal of 1286522 is 2256821.

It can be written as a sum of positive squares in 3 ways, for example, as 1274641 + 11881 = 1129^2 + 109^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1286491 and 1286500.

It is not an unprimeable number, because it can be changed into a prime (1286521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5504 + ... + 5732.

2^1286522 is an apocalyptic number.

1286522 is a deficient number, since it is larger than the sum of its proper divisors (688948).

1286522 is an equidigital number, since it uses as much as digits as its factorization.

1286522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 284 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 1286522 is about 1134.2495316287. The cubic root of 1286522 is about 108.7608030841.

Subtracting 1286522 from its reverse (2256821), we obtain a cube (970299 = 99³).

The spelling of 1286522 in words is "one million, two hundred eighty-six thousand, five hundred twenty-two".