10242581 has 2 divisors, whose sum is σ = 10242582. Its totient is φ = 10242580.

The previous prime is 10242553. The next prime is 10242601. The reversal of 10242581 is 18524201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8702500 + 1540081 = 2950^2 + 1241^2 .

It is an emirp because it is prime and its reverse (18524201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10242581 - 2¹⁰ = 10241557 is a prime.

It is a super-2 number, since 2×10242581² = 209820931083122, which contains 22 as substring.

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 (10244581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5121290 + 5121291.

It is an arithmetic number, because the mean of its divisors is an integer number (5121291).

Almost surely, 2^10242581 is an apocalyptic number.

It is an amenable number.

10242581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10242581 is an equidigital number, since it uses as much as digits as its factorization.

10242581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 10242581 is about 3200.4032558414. The cubic root of 10242581 is about 217.1716523571.

Adding to 10242581 its reverse (18524201), we get a palindrome (28766782).

The spelling of 10242581 in words is "ten million, two hundred forty-two thousand, five hundred eighty-one".