26404121 has 2 divisors, whose sum is σ = 26404122. Its totient is φ = 26404120.

The previous prime is 26404117. The next prime is 26404151. The reversal of 26404121 is 12140462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18361225 + 8042896 = 4285^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 26404121 - 2² = 26404117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26404093 and 26404102.

It is not a weakly prime, because it can be changed into another prime (26404151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13202060 + 13202061.

It is an arithmetic number, because the mean of its divisors is an integer number (13202061).

Almost surely, 2^26404121 is an apocalyptic number.

It is an amenable number.

26404121 is a deficient number, since it is larger than the sum of its proper divisors (1).

26404121 is an equidigital number, since it uses as much as digits as its factorization.

26404121 is an evil number, because the sum of its binary digits is even.

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

The square root of 26404121 is about 5138.4940400861. The cubic root of 26404121 is about 297.7766031374.

Adding to 26404121 its reverse (12140462), we get a palindrome (38544583).

The spelling of 26404121 in words is "twenty-six million, four hundred four thousand, one hundred twenty-one".