131549 has 4 divisors (see below), whose sum is σ = 143520. Its totient is φ = 119580.

The previous prime is 131543. The next prime is 131561. The reversal of 131549 is 945131.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 131549 - 2⁸ = 131293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131543) 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, 5969 + ... + 5990.

It is an arithmetic number, because the mean of its divisors is an integer number (35880).

2¹³¹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

131549 is a deficient number, since it is larger than the sum of its proper divisors (11971).

131549 is a wasteful number, since it uses less digits than its factorization.

131549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11970.

The product of its digits is 540, while the sum is 23.

The square root of 131549 is about 362.6968431073. The cubic root of 131549 is about 50.8583793683.

The spelling of 131549 in words is "one hundred thirty-one thousand, five hundred forty-nine".