131420140 has 24 divisors (see below), whose sum is σ = 280662480. Its totient is φ = 51676608.

The previous prime is 131420111. The next prime is 131420143. The reversal of 131420140 is 41024131.

It is not an unprimeable number, because it can be changed into a prime (131420143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54507 + ... + 56866.

It is an arithmetic number, because the mean of its divisors is an integer number (11694270).

Almost surely, 2^131420140 is an apocalyptic number.

131420140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131420140 is an abundant number, since it is smaller than the sum of its proper divisors (149242340).

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

131420140 is a wasteful number, since it uses less digits than its factorization.

131420140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111441 (or 111439 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 131420140 is about 11463.8623508833. The cubic root of 131420140 is about 508.4176768287.

Adding to 131420140 its reverse (41024131), we get a palindrome (172444271).

The spelling of 131420140 in words is "one hundred thirty-one million, four hundred twenty thousand, one hundred forty".