10245021257 has 2 divisors, whose sum is σ = 10245021258. Its totient is φ = 10245021256.

The previous prime is 10245021229. The next prime is 10245021301. The reversal of 10245021257 is 75212054201.

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., 5552634256 + 4692387001 = 74516^2 + 68501^2 .

It is a cyclic number.

It is not a de Polignac number, because 10245021257 - 2²⁰ = 10243972681 is a prime.

It is not a weakly prime, because it can be changed into another prime (10245029257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5122510628 + 5122510629.

It is an arithmetic number, because the mean of its divisors is an integer number (5122510629).

Almost surely, 2^10245021257 is an apocalyptic number.

It is an amenable number.

10245021257 is a deficient number, since it is larger than the sum of its proper divisors (1).

10245021257 is an equidigital number, since it uses as much as digits as its factorization.

10245021257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 29.

Adding to 10245021257 its reverse (75212054201), we get a palindrome (85457075458).

The spelling of 10245021257 in words is "ten billion, two hundred forty-five million, twenty-one thousand, two hundred fifty-seven".