1002425521 has 2 divisors, whose sum is σ = 1002425522. Its totient is φ = 1002425520.

The previous prime is 1002425509. The next prime is 1002425527. The reversal of 1002425521 is 1255242001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654080625 + 348344896 = 25575^2 + 18664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002425521 - 2¹⁵ = 1002392753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002425492 and 1002425501.

It is not a weakly prime, because it can be changed into another prime (1002425527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501212760 + 501212761.

It is an arithmetic number, because the mean of its divisors is an integer number (501212761).

Almost surely, 2^1002425521 is an apocalyptic number.

It is an amenable number.

1002425521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002425521 is an equidigital number, since it uses as much as digits as its factorization.

1002425521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1002425521 is about 31661.1042290063. The cubic root of 1002425521 is about 1000.8078541959.

Adding to 1002425521 its reverse (1255242001), we get a palindrome (2257667522).

The spelling of 1002425521 in words is "one billion, two million, four hundred twenty-five thousand, five hundred twenty-one".