420511 has 8 divisors (see below), whose sum is σ = 517664. Its totient is φ = 332640.

The previous prime is 420503. The next prime is 420521. The reversal of 420511 is 115024.

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

It is not a de Polignac number, because 420511 - 2³ = 420503 is a prime.

It is a super-2 number, since 2×420511² = 353659002242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 420491 and 420500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420521) 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, 2220 + ... + 2401.

It is an arithmetic number, because the mean of its divisors is an integer number (64708).

2⁴²⁰⁵¹¹ is an apocalyptic number.

420511 is a deficient number, since it is larger than the sum of its proper divisors (97153).

420511 is a wasteful number, since it uses less digits than its factorization.

420511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 420511 is about 648.4681950566. The cubic root of 420511 is about 74.9190831012.

Adding to 420511 its reverse (115024), we get a palindrome (535535).

The spelling of 420511 in words is "four hundred twenty thousand, five hundred eleven".