26553421 has 4 divisors (see below), whose sum is σ = 26574844. Its totient is φ = 26532000.

The previous prime is 26553419. The next prime is 26553427. The reversal of 26553421 is 12435562.

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 17732521 + 8820900 = 4211^2 + 2970^2 .

It is a cyclic number.

It is not a de Polignac number, because 26553421 - 2¹ = 26553419 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 26553421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26553427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8730 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (6643711).

Almost surely, 2^26553421 is an apocalyptic number.

It is an amenable number.

26553421 is a deficient number, since it is larger than the sum of its proper divisors (21423).

26553421 is a wasteful number, since it uses less digits than its factorization.

26553421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21422.

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

The square root of 26553421 is about 5153.0011643701. The cubic root of 26553421 is about 298.3367999625.

Adding to 26553421 its reverse (12435562), we get a palindrome (38988983).

The spelling of 26553421 in words is "twenty-six million, five hundred fifty-three thousand, four hundred twenty-one".