865724541 has 16 divisors (see below), whose sum is σ = 1333309248. Its totient is φ = 493817600.

The previous prime is 865724479. The next prime is 865724549. The reversal of 865724541 is 145427568.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 865724541 - 2⁶ = 865724477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865724493 and 865724502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865724549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771030 + ... + 772151.

It is an arithmetic number, because the mean of its divisors is an integer number (83331828).

Almost surely, 2^865724541 is an apocalyptic number.

It is an amenable number.

865724541 is a deficient number, since it is larger than the sum of its proper divisors (467584707).

865724541 is a wasteful number, since it uses less digits than its factorization.

865724541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543212.

The product of its digits is 268800, while the sum is 42.

The square root of 865724541 is about 29423.1973279588. The cubic root of 865724541 is about 953.0738994315.

The spelling of 865724541 in words is "eight hundred sixty-five million, seven hundred twenty-four thousand, five hundred forty-one".