131798142 has 144 divisors (see below), whose sum is σ = 355324320. Its totient is φ = 35126784.

The previous prime is 131798131. The next prime is 131798167. The reversal of 131798142 is 241897131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 131798097 and 131798106.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1480834 + ... + 1480922.

It is an arithmetic number, because the mean of its divisors is an integer number (2467530).

Almost surely, 2^131798142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131798142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177662160).

131798142 is an abundant number, since it is smaller than the sum of its proper divisors (223526178).

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

131798142 is a wasteful number, since it uses less digits than its factorization.

131798142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 197 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 131798142 is about 11480.3371901700. The cubic root of 131798142 is about 508.9046618901.

It can be divided in two parts, 13179 and 8142, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 131798142 in words is "one hundred thirty-one million, seven hundred ninety-eight thousand, one hundred forty-two".