26726021 has 6 divisors (see below), whose sum is σ = 31089510. Its totient is φ = 22907976.

The previous prime is 26726009. The next prime is 26726039. The reversal of 26726021 is 12062762.

It can be written as a sum of positive squares in only one way, i.e., 25897921 + 828100 = 5089^2 + 910^2 .

It is not a de Polignac number, because 26726021 - 2¹⁴ = 26709637 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 (26725021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272666 + ... + 272763.

It is an arithmetic number, because the mean of its divisors is an integer number (5181585).

Almost surely, 2^26726021 is an apocalyptic number.

It is an amenable number.

26726021 is a deficient number, since it is larger than the sum of its proper divisors (4363489).

26726021 is an equidigital number, since it uses as much as digits as its factorization.

26726021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545443 (or 545436 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 26726021 is about 5169.7215592331. The cubic root of 26726021 is about 298.9818111775.

Adding to 26726021 its reverse (12062762), we get a palindrome (38788783).

The spelling of 26726021 in words is "twenty-six million, seven hundred twenty-six thousand, twenty-one".