26510261 has 2 divisors, whose sum is σ = 26510262. Its totient is φ = 26510260.

The previous prime is 26510257. The next prime is 26510291. The reversal of 26510261 is 16201562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26112100 + 398161 = 5110^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 26510261 - 2² = 26510257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26510221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13255130 + 13255131.

It is an arithmetic number, because the mean of its divisors is an integer number (13255131).

Almost surely, 2^26510261 is an apocalyptic number.

It is an amenable number.

26510261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26510261 is an equidigital number, since it uses as much as digits as its factorization.

26510261 is an evil number, because the sum of its binary digits is even.

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

The square root of 26510261 is about 5148.8116104593. The cubic root of 26510261 is about 298.1750731686.

The spelling of 26510261 in words is "twenty-six million, five hundred ten thousand, two hundred sixty-one".