21269246 has 16 divisors (see below), whose sum is σ = 33903360. Its totient is φ = 9978840.

The previous prime is 21269243. The next prime is 21269251. The reversal of 21269246 is 64296212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21269243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 6681.

It is an arithmetic number, because the mean of its divisors is an integer number (2118960).

Almost surely, 2^21269246 is an apocalyptic number.

21269246 is a deficient number, since it is larger than the sum of its proper divisors (12634114).

21269246 is a wasteful number, since it uses less digits than its factorization.

21269246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359.

The product of its digits is 10368, while the sum is 32.

The square root of 21269246 is about 4611.8592779919. The cubic root of 21269246 is about 277.0665082038.

The spelling of 21269246 in words is "twenty-one million, two hundred sixty-nine thousand, two hundred forty-six".