26440121 has 4 divisors (see below), whose sum is σ = 27085044. Its totient is φ = 25795200.

The previous prime is 26440103. The next prime is 26440129. The reversal of 26440121 is 12104462.

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 9834496 + 16605625 = 3136^2 + 4075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26440121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26440093 and 26440102.

It is not an unprimeable number, because it can be changed into a prime (26440129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322400 + ... + 322481.

It is an arithmetic number, because the mean of its divisors is an integer number (6771261).

Almost surely, 2^26440121 is an apocalyptic number.

It is an amenable number.

26440121 is a deficient number, since it is larger than the sum of its proper divisors (644923).

26440121 is an equidigital number, since it uses as much as digits as its factorization.

26440121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644922.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 26440121 is about 5141.9958187459. The cubic root of 26440121 is about 297.9118735554.

Adding to 26440121 its reverse (12104462), we get a palindrome (38544583).

The spelling of 26440121 in words is "twenty-six million, four hundred forty thousand, one hundred twenty-one".