131442404 has 6 divisors (see below), whose sum is σ = 230024214. Its totient is φ = 65721200.

The previous prime is 131442349. The next prime is 131442427. The reversal of 131442404 is 404244131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 113379904 + 18062500 = 10648^2 + 4250^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131442404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16430297 + ... + 16430304.

It is an arithmetic number, because the mean of its divisors is an integer number (38337369).

Almost surely, 2^131442404 is an apocalyptic number.

It is an amenable number.

131442404 is a deficient number, since it is larger than the sum of its proper divisors (98581810).

131442404 is a wasteful number, since it uses less digits than its factorization.

131442404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32860605 (or 32860603 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 131442404 is about 11464.8333611963. The cubic root of 131442404 is about 508.4463857009.

Adding to 131442404 its reverse (404244131), we get a palindrome (535686535).

The spelling of 131442404 in words is "one hundred thirty-one million, four hundred forty-two thousand, four hundred four".