26355421 has 4 divisors (see below), whose sum is σ = 26563072. Its totient is φ = 26147772.

The previous prime is 26355419. The next prime is 26355443. The reversal of 26355421 is 12455362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26355421 - 2¹ = 26355419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26355421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26355821) 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 3 ways as a sum of consecutive naturals, for example, 103635 + ... + 103888.

It is an arithmetic number, because the mean of its divisors is an integer number (6640768).

Almost surely, 2^26355421 is an apocalyptic number.

It is an amenable number.

26355421 is a deficient number, since it is larger than the sum of its proper divisors (207651).

26355421 is a wasteful number, since it uses less digits than its factorization.

26355421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207650.

The product of its digits is 7200, while the sum is 28.

The square root of 26355421 is about 5133.7531105420. The cubic root of 26355421 is about 297.5934165126.

The spelling of 26355421 in words is "twenty-six million, three hundred fifty-five thousand, four hundred twenty-one".