131240142 has 64 divisors (see below), whose sum is σ = 321235200. Its totient is φ = 39385440.

The previous prime is 131240141. The next prime is 131240177. The reversal of 131240142 is 241042131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131240141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63733 + ... + 65759.

It is an arithmetic number, because the mean of its divisors is an integer number (5019300).

Almost surely, 2^131240142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131240142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160617600).

131240142 is an abundant number, since it is smaller than the sum of its proper divisors (189995058).

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

131240142 is a wasteful number, since it uses less digits than its factorization.

131240142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 131240142 is about 11456.0089909183. The cubic root of 131240142 is about 508.1854547425.

Adding to 131240142 its reverse (241042131), we get a palindrome (372282273).

The spelling of 131240142 in words is "one hundred thirty-one million, two hundred forty thousand, one hundred forty-two".