860147521 has 6 divisors (see below), whose sum is σ = 913721030. Its totient is φ = 809550336.

The previous prime is 860147503. The next prime is 860147527. The reversal of 860147521 is 125741068.

It can be written as a sum of positive squares in 3 ways, for example, as 365574400 + 494573121 = 19120^2 + 22239^2 .

It is not a de Polignac number, because 860147521 - 2²⁷ = 725929793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (860147527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1487856 + ... + 1488433.

Almost surely, 2^860147521 is an apocalyptic number.

It is an amenable number.

860147521 is a deficient number, since it is larger than the sum of its proper divisors (53573509).

860147521 is a wasteful number, since it uses less digits than its factorization.

860147521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976323 (or 2976306 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 860147521 is about 29328.2717015510. The cubic root of 860147521 is about 951.0229133250.

Adding to 860147521 its reverse (125741068), we get a palindrome (985888589).

The spelling of 860147521 in words is "eight hundred sixty million, one hundred forty-seven thousand, five hundred twenty-one".