131207745 has 16 divisors (see below), whose sum is σ = 217172160. Its totient is φ = 67564224.

The previous prime is 131207743. The next prime is 131207759. The reversal of 131207745 is 547702131.

It is not a de Polignac number, because 131207745 - 2¹ = 131207743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131207743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150379 + ... + 151248.

It is an arithmetic number, because the mean of its divisors is an integer number (13573260).

Almost surely, 2^131207745 is an apocalyptic number.

131207745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131207745 is a deficient number, since it is larger than the sum of its proper divisors (85964415).

131207745 is a wasteful number, since it uses less digits than its factorization.

131207745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301664.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 131207745 is about 11454.5949295468. The cubic root of 131207745 is about 508.1436356293.

Adding to 131207745 its reverse (547702131), we get a palindrome (678909876).

The spelling of 131207745 in words is "one hundred thirty-one million, two hundred seven thousand, seven hundred forty-five".