5125124521 has 12 divisors (see below), whose sum is σ = 5964780276. Its totient is φ = 4385131520.

The previous prime is 5125124513. The next prime is 5125124527. The reversal of 5125124521 is 1254215215.

It can be written as a sum of positive squares in 2 ways, for example, as 4711449600 + 413674921 = 68640^2 + 20339^2 .

It is not a de Polignac number, because 5125124521 - 2³ = 5125124513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5125124521.

It is not an unprimeable number, because it can be changed into a prime (5125124527) 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 in 11 ways as a sum of consecutive naturals, for example, 1243720 + ... + 1247833.

It is an arithmetic number, because the mean of its divisors is an integer number (497065023).

Almost surely, 2^5125124521 is an apocalyptic number.

It is an amenable number.

5125124521 is a deficient number, since it is larger than the sum of its proper divisors (839655755).

5125124521 is a wasteful number, since it uses less digits than its factorization.

5125124521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491592 (or 2491581 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The square root of 5125124521 is about 71589.9750034877. The cubic root of 5125124521 is about 1724.1225835078.

Adding to 5125124521 its reverse (1254215215), we get a palindrome (6379339736).

The spelling of 5125124521 in words is "five billion, one hundred twenty-five million, one hundred twenty-four thousand, five hundred twenty-one".