10252040261 has 2 divisors, whose sum is σ = 10252040262. Its totient is φ = 10252040260.

The previous prime is 10252040251. The next prime is 10252040369. The reversal of 10252040261 is 16204025201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6543839236 + 3708201025 = 80894^2 + 60895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10252040261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10252040221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5126020130 + 5126020131.

It is an arithmetic number, because the mean of its divisors is an integer number (5126020131).

Almost surely, 2^10252040261 is an apocalyptic number.

It is an amenable number.

10252040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10252040261 is an equidigital number, since it uses as much as digits as its factorization.

10252040261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 10252040261 its reverse (16204025201), we get a palindrome (26456065462).

The spelling of 10252040261 in words is "ten billion, two hundred fifty-two million, forty thousand, two hundred sixty-one".