1226666 has 12 divisors (see below), whose sum is σ = 2140578. Its totient is φ = 525672.

The previous prime is 1226663. The next prime is 1226677. The reversal of 1226666 is 6666221.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 461041 = 875^2 + 679^2 .

It is an Ulam number.

1226666 is a modest number, since divided by 6666 gives 122 as remainder.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1226663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6161 + ... + 6356.

2^1226666 is an apocalyptic number.

1226666 is a deficient number, since it is larger than the sum of its proper divisors (913912).

1226666 is a wasteful number, since it uses less digits than its factorization.

1226666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12533 (or 12526 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 1226666 is about 1107.5495474244. The cubic root of 1226666 is about 107.0472321828.

The spelling of 1226666 in words is "one million, two hundred twenty-six thousand, six hundred sixty-six".