10181261 has 2 divisors, whose sum is σ = 10181262. Its totient is φ = 10181260.

The previous prime is 10181251. The next prime is 10181263. The reversal of 10181261 is 16218101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10118761 + 62500 = 3181^2 + 250^2 .

It is an emirp because it is prime and its reverse (16218101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10181261 is a prime.

It is a Sophie Germain prime.

Together with 10181263, it forms a pair of twin primes.

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 (10181263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090630 + 5090631.

It is an arithmetic number, because the mean of its divisors is an integer number (5090631).

Almost surely, 2^10181261 is an apocalyptic number.

It is an amenable number.

10181261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10181261 is an equidigital number, since it uses as much as digits as its factorization.

10181261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 10181261 is about 3190.8088316287. The cubic root of 10181261 is about 216.7373988658.

Adding to 10181261 its reverse (16218101), we get a palindrome (26399362).

The spelling of 10181261 in words is "ten million, one hundred eighty-one thousand, two hundred sixty-one".