102641261 has 2 divisors, whose sum is σ = 102641262. Its totient is φ = 102641260.

The previous prime is 102641243. The next prime is 102641309. The reversal of 102641261 is 162146201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 5244100 = 9869^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 102641261 - 2⁶ = 102641197 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (102647261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51320630 + 51320631.

It is an arithmetic number, because the mean of its divisors is an integer number (51320631).

Almost surely, 2^102641261 is an apocalyptic number.

It is an amenable number.

102641261 is a deficient number, since it is larger than the sum of its proper divisors (1).

102641261 is an equidigital number, since it uses as much as digits as its factorization.

102641261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102641261 is about 10131.2023472044. The cubic root of 102641261 is about 468.2099725609.

Adding to 102641261 its reverse (162146201), we get a palindrome (264787462).

The spelling of 102641261 in words is "one hundred two million, six hundred forty-one thousand, two hundred sixty-one".