131125578 has 8 divisors (see below), whose sum is σ = 262251168. Its totient is φ = 43708524.

The previous prime is 131125571. The next prime is 131125591. The reversal of 131125578 is 875521131.

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

131125578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (131125571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10927126 + ... + 10927137.

It is an arithmetic number, because the mean of its divisors is an integer number (32781396).

Almost surely, 2^131125578 is an apocalyptic number.

131125578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131125578 is a wasteful number, since it uses less digits than its factorization.

131125578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21854268.

The product of its digits is 8400, while the sum is 33.

The square root of 131125578 is about 11451.0077285800. The cubic root of 131125578 is about 508.0375408841.

The spelling of 131125578 in words is "one hundred thirty-one million, one hundred twenty-five thousand, five hundred seventy-eight".