26281421 has 4 divisors (see below), whose sum is σ = 26303100. Its totient is φ = 26259744.

The previous prime is 26281393. The next prime is 26281429. The reversal of 26281421 is 12418262.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23522500 + 2758921 = 4850^2 + 1661^2 .

It is a cyclic number.

It is not a de Polignac number, because 26281421 - 2⁶ = 26281357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26281429) 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 3 ways as a sum of consecutive naturals, for example, 8906 + ... + 11483.

It is an arithmetic number, because the mean of its divisors is an integer number (6575775).

Almost surely, 2^26281421 is an apocalyptic number.

It is an amenable number.

26281421 is a deficient number, since it is larger than the sum of its proper divisors (21679).

26281421 is a wasteful number, since it uses less digits than its factorization.

26281421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21678.

The product of its digits is 1536, while the sum is 26.

The square root of 26281421 is about 5126.5408415422. The cubic root of 26281421 is about 297.3146306559.

Adding to 26281421 its reverse (12418262), we get a palindrome (38699683).

The spelling of 26281421 in words is "twenty-six million, two hundred eighty-one thousand, four hundred twenty-one".