421243131 has 8 divisors (see below), whose sum is σ = 561777664. Its totient is φ = 280768680.

The previous prime is 421243103. The next prime is 421243157. The reversal of 421243131 is 131342124.

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

It is not a de Polignac number, because 421243131 - 2²³ = 412854523 is a prime.

It is a super-2 number, since 2×421243131² = 354891550829366322, 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 = 421243098 and 421243107.

It is not an unprimeable number, because it can be changed into a prime (421243171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5250 + ... + 29496.

It is an arithmetic number, because the mean of its divisors is an integer number (70222208).

Almost surely, 2^421243131 is an apocalyptic number.

421243131 is a deficient number, since it is larger than the sum of its proper divisors (140534533).

421243131 is a wasteful number, since it uses less digits than its factorization.

421243131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30041.

The product of its digits is 576, while the sum is 21.

The square root of 421243131 is about 20524.2084134809. The cubic root of 421243131 is about 749.6253720141.

Adding to 421243131 its reverse (131342124), we get a palindrome (552585255).

The spelling of 421243131 in words is "four hundred twenty-one million, two hundred forty-three thousand, one hundred thirty-one".