21272852 has 6 divisors (see below), whose sum is σ = 37227498. Its totient is φ = 10636424.

The previous prime is 21272843. The next prime is 21272947. The reversal of 21272852 is 25827212.

21272852 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in only one way, i.e., 16273156 + 4999696 = 4034^2 + 2236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2659103 + ... + 2659110.

It is an arithmetic number, because the mean of its divisors is an integer number (6204583).

Almost surely, 2^21272852 is an apocalyptic number.

It is an amenable number.

21272852 is a deficient number, since it is larger than the sum of its proper divisors (15954646).

21272852 is a wasteful number, since it uses less digits than its factorization.

21272852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318217 (or 5318215 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 21272852 is about 4612.2502100385. The cubic root of 21272852 is about 277.0821653232.

The spelling of 21272852 in words is "twenty-one million, two hundred seventy-two thousand, eight hundred fifty-two".