21127465 has 8 divisors (see below), whose sum is σ = 25486848. Its totient is φ = 16812720.

The previous prime is 21127459. The next prime is 21127493. The reversal of 21127465 is 56472112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21127465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10107 + ... + 12016.

It is an arithmetic number, because the mean of its divisors is an integer number (3185856).

Almost surely, 2^21127465 is an apocalyptic number.

It is an amenable number.

21127465 is a deficient number, since it is larger than the sum of its proper divisors (4359383).

21127465 is a wasteful number, since it uses less digits than its factorization.

21127465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22319.

The product of its digits is 3360, while the sum is 28.

The square root of 21127465 is about 4596.4622265390. The cubic root of 21127465 is about 276.4494924787.

Adding to 21127465 its reverse (56472112), we get a palindrome (77599577).

The spelling of 21127465 in words is "twenty-one million, one hundred twenty-seven thousand, four hundred sixty-five".