131142780 has 96 divisors (see below), whose sum is σ = 425779200. Its totient is φ = 33447744.

The previous prime is 131142761. The next prime is 131142787. The reversal of 131142780 is 87241131.

It is a super-2 number, since 2×131142780² = 34396857492256800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131142787) 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, 7141 + ... + 17699.

It is an arithmetic number, because the mean of its divisors is an integer number (4435200).

Almost surely, 2^131142780 is an apocalyptic number.

131142780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131142780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212889600).

131142780 is an abundant number, since it is smaller than the sum of its proper divisors (294636420).

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

131142780 is a wasteful number, since it uses less digits than its factorization.

131142780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600 (or 10592 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 131142780 is about 11451.7588168805. The cubic root of 131142780 is about 508.0597559235.

The spelling of 131142780 in words is "one hundred thirty-one million, one hundred forty-two thousand, seven hundred eighty".