21126027 has 8 divisors (see below), whose sum is σ = 30334864. Its totient is φ = 13000608.

The previous prime is 21126023. The next prime is 21126031. The reversal of 21126027 is 72062112.

It is an interprime number because it is at equal distance from previous prime (21126023) and next prime (21126031).

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

It is not a de Polignac number, because 21126027 - 2² = 21126023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21125994 and 21126012.

It is not an unprimeable number, because it can be changed into a prime (21126023) 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, 270808 + ... + 270885.

It is an arithmetic number, because the mean of its divisors is an integer number (3791858).

Almost surely, 2^21126027 is an apocalyptic number.

21126027 is a deficient number, since it is larger than the sum of its proper divisors (9208837).

21126027 is a wasteful number, since it uses less digits than its factorization.

21126027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541709.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21126027 is about 4596.3057992262. The cubic root of 21126027 is about 276.4432203366.

Adding to 21126027 its reverse (72062112), we get a palindrome (93188139).

The spelling of 21126027 in words is "twenty-one million, one hundred twenty-six thousand, twenty-seven".