260421 has 8 divisors (see below), whose sum is σ = 396864. Its totient is φ = 148800.

The previous prime is 260419. The next prime is 260441. The reversal of 260421 is 124062.

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

It is not a de Polignac number, because 260421 - 2¹ = 260419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 260421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6180 + ... + 6221.

It is an arithmetic number, because the mean of its divisors is an integer number (49608).

2²⁶⁰⁴²¹ is an apocalyptic number.

260421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

260421 is a deficient number, since it is larger than the sum of its proper divisors (136443).

260421 is a wasteful number, since it uses less digits than its factorization.

260421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12411.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 260421 is about 510.3146088444. The cubic root of 260421 is about 63.8594735694.

Adding to 260421 its reverse (124062), we get a palindrome (384483).

The spelling of 260421 in words is "two hundred sixty thousand, four hundred twenty-one".