1525030121 has 2 divisors, whose sum is σ = 1525030122. Its totient is φ = 1525030120.

The previous prime is 1525030093. The next prime is 1525030123. The reversal of 1525030121 is 1210305251.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970945600 + 554084521 = 31160^2 + 23539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525030121 - 2⁶ = 1525030057 is a prime.

Together with 1525030123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1525030093 and 1525030102.

It is not a weakly prime, because it can be changed into another prime (1525030123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762515060 + 762515061.

It is an arithmetic number, because the mean of its divisors is an integer number (762515061).

Almost surely, 2^1525030121 is an apocalyptic number.

It is an amenable number.

1525030121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1525030121 is an equidigital number, since it uses as much as digits as its factorization.

1525030121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1525030121 is about 39051.6340375150. The cubic root of 1525030121 is about 1151.0463371696.

Adding to 1525030121 its reverse (1210305251), we get a palindrome (2735335372).

The spelling of 1525030121 in words is "one billion, five hundred twenty-five million, thirty thousand, one hundred twenty-one".