420831129 has 16 divisors (see below), whose sum is σ = 578672640. Its totient is φ = 271906320.

The previous prime is 420831119. The next prime is 420831157. The reversal of 420831129 is 921138024.

It is not a de Polignac number, because 420831129 - 2⁴ = 420831113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420831096 and 420831105.

It is not an unprimeable number, because it can be changed into a prime (420831119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4177 + ... + 29310.

It is an arithmetic number, because the mean of its divisors is an integer number (36167040).

Almost surely, 2^420831129 is an apocalyptic number.

It is an amenable number.

420831129 is a deficient number, since it is larger than the sum of its proper divisors (157841511).

420831129 is a wasteful number, since it uses less digits than its factorization.

420831129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33620.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 420831129 is about 20514.1689814625. The cubic root of 420831129 is about 749.3808988701.

The spelling of 420831129 in words is "four hundred twenty million, eight hundred thirty-one thousand, one hundred twenty-nine".