26421331 has 4 divisors (see below), whose sum is σ = 27273664. Its totient is φ = 25569000.

The previous prime is 26421299. The next prime is 26421337. The reversal of 26421331 is 13312462.

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

It is a cyclic number.

It is not a de Polignac number, because 26421331 - 2⁵ = 26421299 is a prime.

It is a super-3 number, since 3×26421331³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26421337) 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, 426120 + ... + 426181.

It is an arithmetic number, because the mean of its divisors is an integer number (6818416).

Almost surely, 2^26421331 is an apocalyptic number.

26421331 is a deficient number, since it is larger than the sum of its proper divisors (852333).

26421331 is an equidigital number, since it uses as much as digits as its factorization.

26421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852332.

The product of its digits is 864, while the sum is 22.

The square root of 26421331 is about 5140.1683824560. The cubic root of 26421331 is about 297.8412852417.

Adding to 26421331 its reverse (13312462), we get a palindrome (39733793).

The spelling of 26421331 in words is "twenty-six million, four hundred twenty-one thousand, three hundred thirty-one".