131430042 has 24 divisors (see below), whose sum is σ = 285858144. Its totient is φ = 43641864.

The previous prime is 131430041. The next prime is 131430083. The reversal of 131430042 is 240034131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131429997 and 131430024.

It is not an unprimeable number, because it can be changed into a prime (131430041) 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 11 ways as a sum of consecutive naturals, for example, 9148 + ... + 18615.

It is an arithmetic number, because the mean of its divisors is an integer number (11910756).

Almost surely, 2^131430042 is an apocalyptic number.

131430042 is an abundant number, since it is smaller than the sum of its proper divisors (154428102).

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

131430042 is a wasteful number, since it uses less digits than its factorization.

131430042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28034 (or 28031 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 131430042 is about 11464.2942216257. The cubic root of 131430042 is about 508.4304456108.

Adding to 131430042 its reverse (240034131), we get a palindrome (371464173).

The spelling of 131430042 in words is "one hundred thirty-one million, four hundred thirty thousand, forty-two".