420513 has 4 divisors (see below), whose sum is σ = 560688. Its totient is φ = 280340.

The previous prime is 420503. The next prime is 420521. The reversal of 420513 is 315024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420513 - 2⁵ = 420481 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 420492 and 420501.

It is not an unprimeable number, because it can be changed into a prime (420503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70083 + ... + 70088.

It is an arithmetic number, because the mean of its divisors is an integer number (140172).

2⁴²⁰⁵¹³ is an apocalyptic number.

It is an amenable number.

420513 is a deficient number, since it is larger than the sum of its proper divisors (140175).

420513 is a wasteful number, since it uses less digits than its factorization.

420513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140174.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 420513 is about 648.4697371505. The cubic root of 420513 is about 74.9192018757.

Adding to 420513 its reverse (315024), we get a palindrome (735537).

The spelling of 420513 in words is "four hundred twenty thousand, five hundred thirteen".