26138641 has 4 divisors (see below), whose sum is σ = 26329572. Its totient is φ = 25947712.

The previous prime is 26138633. The next prime is 26138653. The reversal of 26138641 is 14683162.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18740241 + 7398400 = 4329^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 26138641 - 2³ = 26138633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26138681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95260 + ... + 95533.

It is an arithmetic number, because the mean of its divisors is an integer number (6582393).

Almost surely, 2^26138641 is an apocalyptic number.

It is an amenable number.

26138641 is a deficient number, since it is larger than the sum of its proper divisors (190931).

26138641 is a wasteful number, since it uses less digits than its factorization.

26138641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190930.

The product of its digits is 6912, while the sum is 31.

The square root of 26138641 is about 5112.5963071614. The cubic root of 26138641 is about 296.7752421390.

The spelling of 26138641 in words is "twenty-six million, one hundred thirty-eight thousand, six hundred forty-one".