26921245 has 16 divisors (see below), whose sum is σ = 34922160. Its totient is φ = 19805184.

The previous prime is 26921239. The next prime is 26921249. The reversal of 26921245 is 54212962.

It can be written as a sum of positive squares in 8 ways, for example, as 68121 + 26853124 = 261^2 + 5182^2 .

It is a cyclic number.

It is not a de Polignac number, because 26921245 - 2⁷ = 26921117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26921249) 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 15 ways as a sum of consecutive naturals, for example, 21291 + ... + 22519.

It is an arithmetic number, because the mean of its divisors is an integer number (2182635).

Almost surely, 2^26921245 is an apocalyptic number.

It is an amenable number.

26921245 is a deficient number, since it is larger than the sum of its proper divisors (8000915).

26921245 is a wasteful number, since it uses less digits than its factorization.

26921245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584.

The product of its digits is 8640, while the sum is 31.

The square root of 26921245 is about 5188.5686851000. The cubic root of 26921245 is about 299.7080307535.

The spelling of 26921245 in words is "twenty-six million, nine hundred twenty-one thousand, two hundred forty-five".