131378 has 16 divisors (see below), whose sum is σ = 220416. Its totient is φ = 58320.

The previous prime is 131371. The next prime is 131381. The reversal of 131378 is 873131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131371) by changing a digit.

131378 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725 + ... + 887.

It is an arithmetic number, because the mean of its divisors is an integer number (13776).

2¹³¹³⁷⁸ is an apocalyptic number.

131378 is a deficient number, since it is larger than the sum of its proper divisors (89038).

131378 is a wasteful number, since it uses less digits than its factorization.

131378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its digits is 504, while the sum is 23.

The square root of 131378 is about 362.4610323883. The cubic root of 131378 is about 50.8363329473.

The spelling of 131378 in words is "one hundred thirty-one thousand, three hundred seventy-eight".