526421 has 8 divisors (see below), whose sum is σ = 606720. Its totient is φ = 447408.

The previous prime is 526397. The next prime is 526423. The reversal of 526421 is 124625.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 526421 - 2¹⁰ = 525397 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 526393 and 526402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (526423) 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, 860 + ... + 1338.

It is an arithmetic number, because the mean of its divisors is an integer number (75840).

2⁵²⁶⁴²¹ is an apocalyptic number.

It is an amenable number.

526421 is a deficient number, since it is larger than the sum of its proper divisors (80299).

526421 is a wasteful number, since it uses less digits than its factorization.

526421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643.

The product of its digits is 480, while the sum is 20.

The square root of 526421 is about 725.5487578378. The cubic root of 526421 is about 80.7441502918.

The spelling of 526421 in words is "five hundred twenty-six thousand, four hundred twenty-one".