7521817142 has 16 divisors (see below), whose sum is σ = 12895669152. Its totient is φ = 3223354560.

The previous prime is 7521817139. The next prime is 7521817151. The reversal of 7521817142 is 2417181257.

It is a junction number, because it is equal to n+sod(n) for n = 7521817096 and 7521817105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265292 + ... + 292272.

It is an arithmetic number, because the mean of its divisors is an integer number (805979322).

Almost surely, 2^7521817142 is an apocalyptic number.

7521817142 is a deficient number, since it is larger than the sum of its proper divisors (5373852010).

7521817142 is a wasteful number, since it uses less digits than its factorization.

7521817142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46903.

The product of its digits is 31360, while the sum is 38.

The square root of 7521817142 is about 86728.4102356316. The cubic root of 7521817142 is about 1959.3300103125.

Adding to 7521817142 its reverse (2417181257), we get a palindrome (9938998399).

The spelling of 7521817142 in words is "seven billion, five hundred twenty-one million, eight hundred seventeen thousand, one hundred forty-two".