420120511 has 4 divisors (see below), whose sum is σ = 420279552. Its totient is φ = 419961472.

The previous prime is 420120497. The next prime is 420120527. The reversal of 420120511 is 115021024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420120511 - 2¹⁹ = 419596223 is a prime.

It is a super-2 number, since 2×420120511² = 353002487525802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420120611) 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, 75490 + ... + 80863.

It is an arithmetic number, because the mean of its divisors is an integer number (105069888).

Almost surely, 2^420120511 is an apocalyptic number.

420120511 is a deficient number, since it is larger than the sum of its proper divisors (159041).

420120511 is a wasteful number, since it uses less digits than its factorization.

420120511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159040.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 420120511 is about 20496.8414883855. The cubic root of 420120511 is about 748.9588581819.

Adding to 420120511 its reverse (115021024), we get a palindrome (535141535).

The spelling of 420120511 in words is "four hundred twenty million, one hundred twenty thousand, five hundred eleven".