131442140 has 24 divisors (see below), whose sum is σ = 277089120. Its totient is φ = 52374848.

The previous prime is 131442131. The next prime is 131442149. The reversal of 131442140 is 41244131.

131442140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (131442131) and next prime (131442149).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131442149) 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, 7235 + ... + 17754.

It is an arithmetic number, because the mean of its divisors is an integer number (11545380).

Almost surely, 2^131442140 is an apocalyptic number.

131442140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131442140 is an abundant number, since it is smaller than the sum of its proper divisors (145646980).

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

131442140 is a wasteful number, since it uses less digits than its factorization.

131442140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25261 (or 25259 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 131442140 is about 11464.8218477218. The cubic root of 131442140 is about 508.4460452984.

Adding to 131442140 its reverse (41244131), we get a palindrome (172686271).

The spelling of 131442140 in words is "one hundred thirty-one million, four hundred forty-two thousand, one hundred forty".