26510401 has 2 divisors, whose sum is σ = 26510402. Its totient is φ = 26510400.

The previous prime is 26510399. The next prime is 26510413. The reversal of 26510401 is 10401562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26255376 + 255025 = 5124^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 26510401 - 2¹ = 26510399 is a prime.

It is a super-2 number, since 2×26510401² = 1405602722361602, which contains 22 as substring.

Together with 26510399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26510431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13255200 + 13255201.

It is an arithmetic number, because the mean of its divisors is an integer number (13255201).

Almost surely, 2^26510401 is an apocalyptic number.

It is an amenable number.

26510401 is a deficient number, since it is larger than the sum of its proper divisors (1).

26510401 is an equidigital number, since it uses as much as digits as its factorization.

26510401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 26510401 is about 5148.8252058115. The cubic root of 26510401 is about 298.1755980526.

Adding to 26510401 its reverse (10401562), we get a palindrome (36911963).

The spelling of 26510401 in words is "twenty-six million, five hundred ten thousand, four hundred one".