8420131 has 4 divisors (see below), whose sum is σ = 8615992. Its totient is φ = 8224272.

The previous prime is 8420123. The next prime is 8420149. The reversal of 8420131 is 1310248.

8420131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8420131 - 2³ = 8420123 is a prime.

It is a super-2 number, since 2×8420131² = 141797212114322, 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 = 8420099 and 8420108.

It is not an unprimeable number, because it can be changed into a prime (8420171) 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, 97866 + ... + 97951.

It is an arithmetic number, because the mean of its divisors is an integer number (2153998).

Almost surely, 2^8420131 is an apocalyptic number.

8420131 is a deficient number, since it is larger than the sum of its proper divisors (195861).

8420131 is a wasteful number, since it uses less digits than its factorization.

8420131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195860.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 8420131 is about 2901.7461984123. The cubic root of 8420131 is about 203.4415312953.

Adding to 8420131 its reverse (1310248), we get a palindrome (9730379).

The spelling of 8420131 in words is "eight million, four hundred twenty thousand, one hundred thirty-one".