268521 has 16 divisors (see below), whose sum is σ = 399360. Its totient is φ = 159120.

The previous prime is 268519. The next prime is 268529. The reversal of 268521 is 125862.

It is not a de Polignac number, because 268521 - 2¹ = 268519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 268491 and 268500.

It is not an unprimeable number, because it can be changed into a prime (268529) 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, 2556 + ... + 2658.

It is an arithmetic number, because the mean of its divisors is an integer number (24960).

2²⁶⁸⁵²¹ is an apocalyptic number.

It is an amenable number.

268521 is a deficient number, since it is larger than the sum of its proper divisors (130839).

268521 is a wasteful number, since it uses less digits than its factorization.

268521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

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

The square root of 268521 is about 518.1901195507. The cubic root of 268521 is about 64.5148094112.

The spelling of 268521 in words is "two hundred sixty-eight thousand, five hundred twenty-one".