8506420 has 24 divisors (see below), whose sum is σ = 19238184. Its totient is φ = 3140736.

The previous prime is 8506403. The next prime is 8506423. The reversal of 8506420 is 246058.

It can be written as a sum of positive squares in 4 ways, for example, as 1140624 + 7365796 = 1068^2 + 2714^2 .

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8506423) 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, 16099 + ... + 16618.

It is an arithmetic number, because the mean of its divisors is an integer number (801591).

Almost surely, 2^8506420 is an apocalyptic number.

It is an amenable number.

8506420 is an abundant number, since it is smaller than the sum of its proper divisors (10731764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8506420 is a wasteful number, since it uses less digits than its factorization.

8506420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32739 (or 32737 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 8506420 is about 2916.5767605191. The cubic root of 8506420 is about 204.1341230002.

The spelling of 8506420 in words is "eight million, five hundred six thousand, four hundred twenty".