26140643 has 8 divisors (see below), whose sum is σ = 26592048. Its totient is φ = 25691904.

The previous prime is 26140633. The next prime is 26140649. The reversal of 26140643 is 34604162.

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

It is a cyclic number.

It is not a de Polignac number, because 26140643 - 2¹² = 26136547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26140649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31196 + ... + 32022.

It is an arithmetic number, because the mean of its divisors is an integer number (3324006).

Almost surely, 2^26140643 is an apocalyptic number.

26140643 is a deficient number, since it is larger than the sum of its proper divisors (451405).

26140643 is an equidigital number, since it uses as much as digits as its factorization.

26140643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 26140643 is about 5112.7920943453. The cubic root of 26140643 is about 296.7828187745.

It can be divided in two parts, 261 and 40643, that added together give a palindrome (40904).

The spelling of 26140643 in words is "twenty-six million, one hundred forty thousand, six hundred forty-three".