1025240514521 has 2 divisors, whose sum is σ = 1025240514522. Its totient is φ = 1025240514520.

The previous prime is 1025240514517. The next prime is 1025240514559. The reversal of 1025240514521 is 1254150425201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948995498896 + 76245015625 = 974164^2 + 276125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025240514521 - 2² = 1025240514517 is a prime.

It is a super-2 number, since 2×1025240514521² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1025240510521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512620257260 + 512620257261.

It is an arithmetic number, because the mean of its divisors is an integer number (512620257261).

Almost surely, 2^{1025240514521} is an apocalyptic number.

It is an amenable number.

1025240514521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025240514521 is an equidigital number, since it uses as much as digits as its factorization.

1025240514521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 1025240514521 its reverse (1254150425201), we get a palindrome (2279390939722).

The spelling of 1025240514521 in words is "one trillion, twenty-five billion, two hundred forty million, five hundred fourteen thousand, five hundred twenty-one".