131421194 has 8 divisors (see below), whose sum is σ = 197691300. Its totient is φ = 65524096.

The previous prime is 131421109. The next prime is 131421197. The reversal of 131421194 is 491124131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 130804969 + 616225 = 11437^2 + 785^2 .

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

It is not an unprimeable number, because it can be changed into a prime (131421197) 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, 92369 + ... + 93780.

Almost surely, 2^131421194 is an apocalyptic number.

131421194 is a deficient number, since it is larger than the sum of its proper divisors (66270106).

131421194 is a wasteful number, since it uses less digits than its factorization.

131421194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186504.

The product of its digits is 864, while the sum is 26.

The square root of 131421194 is about 11463.9083213361. The cubic root of 131421194 is about 508.4190360085.

The spelling of 131421194 in words is "one hundred thirty-one million, four hundred twenty-one thousand, one hundred ninety-four".