131878 has 8 divisors (see below), whose sum is σ = 199368. Its totient is φ = 65424.

The previous prime is 131861. The next prime is 131891. The reversal of 131878 is 878131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

131878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325 + ... + 607.

It is an arithmetic number, because the mean of its divisors is an integer number (24921).

2¹³¹⁸⁷⁸ is an apocalyptic number.

131878 is a deficient number, since it is larger than the sum of its proper divisors (67490).

131878 is a wasteful number, since it uses less digits than its factorization.

131878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its digits is 1344, while the sum is 28.

The square root of 131878 is about 363.1501067052. The cubic root of 131878 is about 50.9007424854.

It can be divided in two parts, 13 and 1878, that added together give a triangular number (1891 = T₆₁).

The spelling of 131878 in words is "one hundred thirty-one thousand, eight hundred seventy-eight".