21041266 has 8 divisors (see below), whose sum is σ = 31584384. Its totient is φ = 10513140.

The previous prime is 21041263. The next prime is 21041299. The reversal of 21041266 is 66214012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21041261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931 + ... + 6553.

It is an arithmetic number, because the mean of its divisors is an integer number (3948048).

Almost surely, 2^21041266 is an apocalyptic number.

21041266 is a deficient number, since it is larger than the sum of its proper divisors (10543118).

21041266 is a wasteful number, since it uses less digits than its factorization.

21041266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7496.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21041266 is about 4587.0759749540. The cubic root of 21041266 is about 276.0730133095.

Adding to 21041266 its reverse (66214012), we get a palindrome (87255278).

The spelling of 21041266 in words is "twenty-one million, forty-one thousand, two hundred sixty-six".