26556421 has 8 divisors (see below), whose sum is σ = 27808704. Its totient is φ = 25312320.

The previous prime is 26556407. The next prime is 26556493. The reversal of 26556421 is 12465562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26556421 - 2⁷ = 26556293 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 (26550421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5181 + ... + 8941.

It is an arithmetic number, because the mean of its divisors is an integer number (3476088).

Almost surely, 2^26556421 is an apocalyptic number.

It is an amenable number.

26556421 is a deficient number, since it is larger than the sum of its proper divisors (1252283).

26556421 is a wasteful number, since it uses less digits than its factorization.

26556421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091.

The product of its digits is 14400, while the sum is 31.

The square root of 26556421 is about 5153.2922486504. The cubic root of 26556421 is about 298.3480348827.

The spelling of 26556421 in words is "twenty-six million, five hundred fifty-six thousand, four hundred twenty-one".