1266642 has 24 divisors (see below), whose sum is σ = 2956044. Its totient is φ = 389664.

The previous prime is 1266631. The next prime is 1266677. The reversal of 1266642 is 2466621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1121481 + 145161 = 1059^2 + 381^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2473 + ... + 2940.

2^1266642 is an apocalyptic number.

1266642 is an abundant number, since it is smaller than the sum of its proper divisors (1689402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266642 is a wasteful number, since it uses less digits than its factorization.

1266642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5434 (or 5431 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1266642 is about 1125.4519092347. The cubic root of 1266642 is about 108.1976832074.

The spelling of 1266642 in words is "one million, two hundred sixty-six thousand, six hundred forty-two".