4085238521 has 24 divisors (see below), whose sum is σ = 5173248960. Its totient is φ = 3157068096.

The previous prime is 4085238511. The next prime is 4085238539. The reversal of 4085238521 is 1258325804.

It is not a de Polignac number, because 4085238521 - 2⁶ = 4085238457 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4085238511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10715 + ... + 91023.

It is an arithmetic number, because the mean of its divisors is an integer number (215552040).

Almost surely, 2^4085238521 is an apocalyptic number.

It is an amenable number.

4085238521 is a deficient number, since it is larger than the sum of its proper divisors (1088010439).

4085238521 is a wasteful number, since it uses less digits than its factorization.

4085238521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80385 (or 80372 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 4085238521 is about 63915.8706504105. The cubic root of 4085238521 is about 1598.5975368000.

The spelling of 4085238521 in words is "four billion, eighty-five million, two hundred thirty-eight thousand, five hundred twenty-one".