862521 has 16 divisors (see below), whose sum is σ = 1278720. Its totient is φ = 512720.

The previous prime is 862501. The next prime is 862541. The reversal of 862521 is 125268.

862521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (862501) and next prime (862541).

It is a cyclic number.

It is not a de Polignac number, because 862521 - 2⁹ = 862009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 862491 and 862500.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 862521.

It is not an unprimeable number, because it can be changed into a prime (862501) 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, 1726 + ... + 2168.

It is an arithmetic number, because the mean of its divisors is an integer number (79920).

2⁸⁶²⁵²¹ is an apocalyptic number.

It is an amenable number.

862521 is a deficient number, since it is larger than the sum of its proper divisors (416199).

862521 is a wasteful number, since it uses less digits than its factorization.

862521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its digits is 960, while the sum is 24.

The square root of 862521 is about 928.7200870015. The cubic root of 862521 is about 95.1896856396.

Adding to 862521 its reverse (125268), we get a palindrome (987789).

It can be divided in two parts, 8625 and 21, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 862521 in words is "eight hundred sixty-two thousand, five hundred twenty-one".