131175745 has 4 divisors (see below), whose sum is σ = 157410900. Its totient is φ = 104940592.

The previous prime is 131175743. The next prime is 131175761. The reversal of 131175745 is 547571131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547571131 = 7753 ⋅70627.

It can be written as a sum of positive squares in 2 ways, for example, as 34586161 + 96589584 = 5881^2 + 9828^2 .

It is a cyclic number.

It is not a de Polignac number, because 131175745 - 2¹ = 131175743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131175745.

It is not an unprimeable number, because it can be changed into a prime (131175743) 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, 13117570 + ... + 13117579.

It is an arithmetic number, because the mean of its divisors is an integer number (39352725).

Almost surely, 2^131175745 is an apocalyptic number.

It is an amenable number.

131175745 is a deficient number, since it is larger than the sum of its proper divisors (26235155).

131175745 is an equidigital number, since it uses as much as digits as its factorization.

131175745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26235154.

The product of its digits is 14700, while the sum is 34.

The square root of 131175745 is about 11453.1980250059. The cubic root of 131175745 is about 508.1023222184.

The spelling of 131175745 in words is "one hundred thirty-one million, one hundred seventy-five thousand, seven hundred forty-five".