131601 has 4 divisors (see below), whose sum is σ = 175472. Its totient is φ = 87732.

The previous prime is 131591. The next prime is 131611. The reversal of 131601 is 106131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (131591) and next prime (131611).

It is not a de Polignac number, because 131601 - 2¹¹ = 129553 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131611) 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, 21931 + ... + 21936.

It is an arithmetic number, because the mean of its divisors is an integer number (43868).

2¹³¹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

131601 is a deficient number, since it is larger than the sum of its proper divisors (43871).

131601 is an equidigital number, since it uses as much as digits as its factorization.

131601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43870.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131601 is about 362.7685212363. The cubic root of 131601 is about 50.8650797545.

Adding to 131601 its reverse (106131), we get a palindrome (237732).

The spelling of 131601 in words is "one hundred thirty-one thousand, six hundred one".