26139745 has 8 divisors (see below), whose sum is σ = 31720680. Its totient is φ = 20676480.

The previous prime is 26139739. The next prime is 26139749. The reversal of 26139745 is 54793162.

It can be written as a sum of positive squares in 4 ways, for example, as 17424 + 26122321 = 132^2 + 5111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26139745 - 2⁵ = 26139713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26139749) 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 7 ways as a sum of consecutive naturals, for example, 28926 + ... + 29815.

It is an arithmetic number, because the mean of its divisors is an integer number (3965085).

Almost surely, 2^26139745 is an apocalyptic number.

It is an amenable number.

26139745 is a deficient number, since it is larger than the sum of its proper divisors (5580935).

26139745 is an equidigital number, since it uses as much as digits as its factorization.

26139745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58835.

The product of its digits is 45360, while the sum is 37.

The square root of 26139745 is about 5112.7042746476. The cubic root of 26139745 is about 296.7794203115.

The spelling of 26139745 in words is "twenty-six million, one hundred thirty-nine thousand, seven hundred forty-five".