21459027 has 8 divisors (see below), whose sum is σ = 28710864. Its totient is φ = 14256608.

The previous prime is 21458989. The next prime is 21459073. The reversal of 21459027 is 72095412.

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 21459027 - 2¹¹ = 21456979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21458985 and 21459003.

It is not an unprimeable number, because it can be changed into a prime (21459077) 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, 11328 + ... + 13085.

It is an arithmetic number, because the mean of its divisors is an integer number (3588858).

Almost surely, 2^21459027 is an apocalyptic number.

21459027 is a deficient number, since it is larger than the sum of its proper divisors (7251837).

21459027 is a wasteful number, since it uses less digits than its factorization.

21459027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24709.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 21459027 is about 4632.3889085438. The cubic root of 21459027 is about 277.8881379736. Note that the first 3 decimals are identical.

The spelling of 21459027 in words is "twenty-one million, four hundred fifty-nine thousand, twenty-seven".