513421 has 8 divisors (see below), whose sum is σ = 533120. Its totient is φ = 494208.

The previous prime is 513419. The next prime is 513427. The reversal of 513421 is 124315.

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 513421 - 2¹ = 513419 is a prime.

It is a super-2 number, since 2×513421² = 527202246482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513395 and 513404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513427) 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, 5245 + ... + 5341.

It is an arithmetic number, because the mean of its divisors is an integer number (66640).

2⁵¹³⁴²¹ is an apocalyptic number.

It is an amenable number.

513421 is a deficient number, since it is larger than the sum of its proper divisors (19699).

513421 is an equidigital number, since it uses as much as digits as its factorization.

513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243.

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

The square root of 513421 is about 716.5340187318. The cubic root of 513421 is about 80.0739420528.

Adding to 513421 its reverse (124315), we get a palindrome (637736).

It can be divided in two parts, 51 and 3421, that multiplied together give a palindrome (174471).

The spelling of 513421 in words is "five hundred thirteen thousand, four hundred twenty-one".