131649 has 8 divisors (see below), whose sum is σ = 200640. Its totient is φ = 75216.

The previous prime is 131641. The next prime is 131671. The reversal of 131649 is 946131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131649 - 2³ = 131641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3114 + ... + 3155.

It is an arithmetic number, because the mean of its divisors is an integer number (25080).

2¹³¹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

131649 is a deficient number, since it is larger than the sum of its proper divisors (68991).

131649 is an equidigital number, since it uses as much as digits as its factorization.

131649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6279.

The product of its digits is 648, while the sum is 24.

The square root of 131649 is about 362.8346730951. The cubic root of 131649 is about 50.8712631601.

It can be divided in two parts, 131 and 649, that added together give a triangular number (780 = T₃₉).

The spelling of 131649 in words is "one hundred thirty-one thousand, six hundred forty-nine".