26730421 has 4 divisors (see below), whose sum is σ = 26761644. Its totient is φ = 26699200.

The previous prime is 26730413. The next prime is 26730433. The reversal of 26730421 is 12403762.

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 4536900 + 22193521 = 2130^2 + 4711^2 .

It is a cyclic number.

It is not a de Polignac number, because 26730421 - 2³ = 26730413 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 (20730421) 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, 14290 + ... + 16051.

It is an arithmetic number, because the mean of its divisors is an integer number (6690411).

Almost surely, 2^26730421 is an apocalyptic number.

It is an amenable number.

26730421 is a deficient number, since it is larger than the sum of its proper divisors (31223).

26730421 is an equidigital number, since it uses as much as digits as its factorization.

26730421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31222.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 26730421 is about 5170.1470965534. The cubic root of 26730421 is about 298.9982177573.

The spelling of 26730421 in words is "twenty-six million, seven hundred thirty thousand, four hundred twenty-one".