1263666 has 16 divisors (see below), whose sum is σ = 2637504. Its totient is φ = 402864.

The previous prime is 1263659. The next prime is 1263667. The reversal of 1263666 is 6663621.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1263667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4441 + ... + 4716.

It is an arithmetic number, because the mean of its divisors is an integer number (164844).

2^1263666 is an apocalyptic number.

1263666 is an abundant number, since it is smaller than the sum of its proper divisors (1373838).

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

1263666 is a wasteful number, since it uses less digits than its factorization.

1263666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9185.

The product of its digits is 7776, while the sum is 30.

The square root of 1263666 is about 1124.1289961566. The cubic root of 1263666 is about 108.1128792365.

The spelling of 1263666 in words is "one million, two hundred sixty-three thousand, six hundred sixty-six".