21268701 has 6 divisors (see below), whose sum is σ = 30721470. Its totient is φ = 14179128.

The previous prime is 21268699. The next prime is 21268727. The reversal of 21268701 is 10786212.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 1153476 = 4485^2 + 1074^2 .

It is not a de Polignac number, because 21268701 - 2¹ = 21268699 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21268001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1181586 + ... + 1181603.

It is an arithmetic number, because the mean of its divisors is an integer number (5120245).

Almost surely, 2^21268701 is an apocalyptic number.

It is an amenable number.

21268701 is a deficient number, since it is larger than the sum of its proper divisors (9452769).

21268701 is a wasteful number, since it uses less digits than its factorization.

21268701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363195 (or 2363192 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 21268701 is about 4611.8001908149. The cubic root of 21268701 is about 277.0641416799.

The spelling of 21268701 in words is "twenty-one million, two hundred sixty-eight thousand, seven hundred one".