131601404 has 12 divisors (see below), whose sum is σ = 251239128. Its totient is φ = 59818800.

The previous prime is 131601389. The next prime is 131601409. The reversal of 131601404 is 404106131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131601409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495427 + ... + 1495514.

It is an arithmetic number, because the mean of its divisors is an integer number (20936594).

Almost surely, 2^131601404 is an apocalyptic number.

It is an amenable number.

131601404 is a deficient number, since it is larger than the sum of its proper divisors (119637724).

131601404 is a wasteful number, since it uses less digits than its factorization.

131601404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990956 (or 2990954 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 131601404 is about 11471.7655136426. The cubic root of 131601404 is about 508.6513180448.

Adding to 131601404 its reverse (404106131), we get a palindrome (535707535).

The spelling of 131601404 in words is "one hundred thirty-one million, six hundred one thousand, four hundred four".