26047421 has 4 divisors (see below), whose sum is σ = 26063100. Its totient is φ = 26031744.

The previous prime is 26047393. The next prime is 26047429. The reversal of 26047421 is 12474062.

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 20340100 + 5707321 = 4510^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 26047421 - 2¹⁴ = 26031037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26047429) 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, 5006 + ... + 8783.

It is an arithmetic number, because the mean of its divisors is an integer number (6515775).

Almost surely, 2^26047421 is an apocalyptic number.

It is an amenable number.

26047421 is a deficient number, since it is larger than the sum of its proper divisors (15679).

26047421 is a wasteful number, since it uses less digits than its factorization.

26047421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15678.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 26047421 is about 5103.6674068752. The cubic root of 26047421 is about 296.4296058193.

The spelling of 26047421 in words is "twenty-six million, forty-seven thousand, four hundred twenty-one".