26268921 has 32 divisors (see below), whose sum is σ = 46417920. Its totient is φ = 14355792.

The previous prime is 26268901. The next prime is 26268923. The reversal of 26268921 is 12986262.

26268921 = 529² + 530² + ... + 609².

It is a happy number.

26268921 is a `hidden beast` number, since 2 + 626 + 8 + 9 + 21 = 666.

It is not a de Polignac number, because 26268921 - 2¹⁰ = 26267897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (26268923) 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 31 ways as a sum of consecutive naturals, for example, 1326 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (1450560).

Almost surely, 2^26268921 is an apocalyptic number.

26268921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26268921 is a deficient number, since it is larger than the sum of its proper divisors (20148999).

26268921 is a wasteful number, since it uses less digits than its factorization.

26268921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082 (or 6076 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 26268921 is about 5125.3215508883. The cubic root of 26268921 is about 297.2674868042.

The spelling of 26268921 in words is "twenty-six million, two hundred sixty-eight thousand, nine hundred twenty-one".