1521252513 has 24 divisors (see below), whose sum is σ = 2399267520. Its totient is φ = 921147360.

The previous prime is 1521252503. The next prime is 1521252527. The reversal of 1521252513 is 3152521251.

It is not a de Polignac number, because 1521252513 - 2¹⁸ = 1520990369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1521252503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115420 + ... + 127922.

It is an arithmetic number, because the mean of its divisors is an integer number (99969480).

Almost surely, 2^1521252513 is an apocalyptic number.

It is an amenable number.

1521252513 is a deficient number, since it is larger than the sum of its proper divisors (878015007).

1521252513 is a wasteful number, since it uses less digits than its factorization.

1521252513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13749 (or 13746 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1521252513 is about 39003.2372118008. The cubic root of 1521252513 is about 1150.0951434830.

Adding to 1521252513 its reverse (3152521251), we get a palindrome (4673773764).

The spelling of 1521252513 in words is "one billion, five hundred twenty-one million, two hundred fifty-two thousand, five hundred thirteen".