131185442 has 4 divisors (see below), whose sum is σ = 196778166. Its totient is φ = 65592720.

The previous prime is 131185423. The next prime is 131185451. The reversal of 131185442 is 244581131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 101384761 + 29800681 = 10069^2 + 5459^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32796359 + ... + 32796362.

Almost surely, 2^131185442 is an apocalyptic number.

131185442 is a deficient number, since it is larger than the sum of its proper divisors (65592724).

131185442 is an equidigital number, since it uses as much as digits as its factorization.

131185442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65592723.

The product of its digits is 3840, while the sum is 29.

The square root of 131185442 is about 11453.6213487263. The cubic root of 131185442 is about 508.1148421824.

The spelling of 131185442 in words is "one hundred thirty-one million, one hundred eighty-five thousand, four hundred forty-two".