26251601 has 2 divisors, whose sum is σ = 26251602. Its totient is φ = 26251600.

The previous prime is 26251573. The next prime is 26251619. The reversal of 26251601 is 10615262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19149376 + 7102225 = 4376^2 + 2665^2 .

It is a cyclic number.

It is not a de Polignac number, because 26251601 - 2¹⁴ = 26235217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26251651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13125800 + 13125801.

It is an arithmetic number, because the mean of its divisors is an integer number (13125801).

Almost surely, 2^26251601 is an apocalyptic number.

It is an amenable number.

26251601 is a deficient number, since it is larger than the sum of its proper divisors (1).

26251601 is an equidigital number, since it uses as much as digits as its factorization.

26251601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 26251601 is about 5123.6316221992. The cubic root of 26251601 is about 297.2021395592.

Adding to 26251601 its reverse (10615262), we get a palindrome (36866863).

The spelling of 26251601 in words is "twenty-six million, two hundred fifty-one thousand, six hundred one".