21267059 has 8 divisors (see below), whose sum is σ = 23273328. Its totient is φ = 19272960.

The previous prime is 21267053. The next prime is 21267067. The reversal of 21267059 is 95076212.

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

It is a cyclic number.

It is not a de Polignac number, because 21267059 - 2²⁴ = 4489843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21267053) 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, 839 + ... + 6575.

It is an arithmetic number, because the mean of its divisors is an integer number (2909166).

Almost surely, 2^21267059 is an apocalyptic number.

21267059 is a deficient number, since it is larger than the sum of its proper divisors (2006269).

21267059 is a wasteful number, since it uses less digits than its factorization.

21267059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6085.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 21267059 is about 4611.6221657894. The cubic root of 21267059 is about 277.0570114681.

The spelling of 21267059 in words is "twenty-one million, two hundred sixty-seven thousand, fifty-nine".