26631245 has 4 divisors (see below), whose sum is σ = 31957500. Its totient is φ = 21304992.

The previous prime is 26631229. The next prime is 26631247. The reversal of 26631245 is 54213662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54213662 = 2 ⋅27106831.

It can be written as a sum of positive squares in 2 ways, for example, as 3031081 + 23600164 = 1741^2 + 4858^2 .

It is a cyclic number.

It is not a de Polignac number, because 26631245 - 2⁴ = 26631229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26631247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663120 + ... + 2663129.

It is an arithmetic number, because the mean of its divisors is an integer number (7989375).

Almost surely, 2^26631245 is an apocalyptic number.

It is an amenable number.

26631245 is a deficient number, since it is larger than the sum of its proper divisors (5326255).

26631245 is an equidigital number, since it uses as much as digits as its factorization.

26631245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326254.

The product of its digits is 8640, while the sum is 29.

The square root of 26631245 is about 5160.5469671344. The cubic root of 26631245 is about 298.6279754688.

The spelling of 26631245 in words is "twenty-six million, six hundred thirty-one thousand, two hundred forty-five".