1266634 has 4 divisors (see below), whose sum is σ = 1899954. Its totient is φ = 633316.

The previous prime is 1266631. The next prime is 1266677. The reversal of 1266634 is 4366621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4366621 = 7 ⋅623803.

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 23409 = 1115^2 + 153^2 .

It is not an unprimeable number, because it can be changed into a prime (1266631) 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 as a sum of consecutive naturals, namely, 316657 + ... + 316660.

2^1266634 is an apocalyptic number.

1266634 is a deficient number, since it is larger than the sum of its proper divisors (633320).

1266634 is an equidigital number, since it uses as much as digits as its factorization.

1266634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633319.

The product of its digits is 5184, while the sum is 28.

The square root of 1266634 is about 1125.4483551012. The cubic root of 1266634 is about 108.1974554179.

The spelling of 1266634 in words is "one million, two hundred sixty-six thousand, six hundred thirty-four".