131345404 has 12 divisors (see below), whose sum is σ = 241952200. Its totient is φ = 62216208.

The previous prime is 131345381. The next prime is 131345407. The reversal of 131345404 is 404543131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131345407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864039 + ... + 864190.

Almost surely, 2^131345404 is an apocalyptic number.

It is an amenable number.

131345404 is a deficient number, since it is larger than the sum of its proper divisors (110606796).

131345404 is a wasteful number, since it uses less digits than its factorization.

131345404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728252 (or 1728250 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 131345404 is about 11460.6022529359. The cubic root of 131345404 is about 508.3212829058.

Adding to 131345404 its reverse (404543131), we get a palindrome (535888535).

The spelling of 131345404 in words is "one hundred thirty-one million, three hundred forty-five thousand, four hundred four".