420136131 has 4 divisors (see below), whose sum is σ = 560181512. Its totient is φ = 280090752.

The previous prime is 420136127. The next prime is 420136133. The reversal of 420136131 is 131631024.

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

It is not a de Polignac number, because 420136131 - 2² = 420136127 is a prime.

It is a super-2 number, since 2×420136131² = 353028737143298322, 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 = 420136098 and 420136107.

It is not an unprimeable number, because it can be changed into a prime (420136133) 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, 70022686 + ... + 70022691.

It is an arithmetic number, because the mean of its divisors is an integer number (140045378).

Almost surely, 2^420136131 is an apocalyptic number.

420136131 is a deficient number, since it is larger than the sum of its proper divisors (140045381).

420136131 is a wasteful number, since it uses less digits than its factorization.

420136131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140045380.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 420136131 is about 20497.2225191610. Note that the first 3 decimals coincide. The cubic root of 420136131 is about 748.9681401157.

Adding to 420136131 its reverse (131631024), we get a palindrome (551767155).

The spelling of 420136131 in words is "four hundred twenty million, one hundred thirty-six thousand, one hundred thirty-one".