131671240 has 16 divisors (see below), whose sum is σ = 296260380. Its totient is φ = 52668480.

The previous prime is 131671201. The next prime is 131671247. The reversal of 131671240 is 42176131.

It can be written as a sum of positive squares in 2 ways, for example, as 128278276 + 3392964 = 11326^2 + 1842^2 .

It is not an unprimeable number, because it can be changed into a prime (131671247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1645851 + ... + 1645930.

Almost surely, 2^131671240 is an apocalyptic number.

131671240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131671240 is an abundant number, since it is smaller than the sum of its proper divisors (164589140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131671240 is a wasteful number, since it uses less digits than its factorization.

131671240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291792 (or 3291788 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 131671240 is about 11474.8089308711. The cubic root of 131671240 is about 508.7412762843.

The spelling of 131671240 in words is "one hundred thirty-one million, six hundred seventy-one thousand, two hundred forty".