21271295 has 4 divisors (see below), whose sum is σ = 25525560. Its totient is φ = 17017032.

The previous prime is 21271277. The next prime is 21271319. The reversal of 21271295 is 59217212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21271295 - 2⁶ = 21271231 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127125 + ... + 2127134.

It is an arithmetic number, because the mean of its divisors is an integer number (6381390).

Almost surely, 2^21271295 is an apocalyptic number.

21271295 is a deficient number, since it is larger than the sum of its proper divisors (4254265).

21271295 is an equidigital number, since it uses as much as digits as its factorization.

21271295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254264.

The product of its digits is 2520, while the sum is 29.

The square root of 21271295 is about 4612.0814173213. The cubic root of 21271295 is about 277.0754051035.

The spelling of 21271295 in words is "twenty-one million, two hundred seventy-one thousand, two hundred ninety-five".