260521 has 8 divisors (see below), whose sum is σ = 278784. Its totient is φ = 242880.

The previous prime is 260489. The next prime is 260527. The reversal of 260521 is 125062.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 260521 - 2⁵ = 260489 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 260495 and 260504.

It is not an unprimeable number, because it can be changed into a prime (260527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961 + ... + 1201.

It is an arithmetic number, because the mean of its divisors is an integer number (34848).

2²⁶⁰⁵²¹ is an apocalyptic number.

It is an amenable number.

260521 is a deficient number, since it is larger than the sum of its proper divisors (18263).

260521 is a wasteful number, since it uses less digits than its factorization.

260521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 260521 is about 510.4125782149. The cubic root of 260521 is about 63.8676464000.

Adding to 260521 its reverse (125062), we get a palindrome (385583).

It can be divided in two parts, 260 and 521, that multiplied together give a triangular number (135460 = T₅₂₀).

The spelling of 260521 in words is "two hundred sixty thousand, five hundred twenty-one".