131611745 has 8 divisors (see below), whose sum is σ = 158089320. Its totient is φ = 105185920.

The previous prime is 131611729. The next prime is 131611759. The reversal of 131611745 is 547116131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43983424 + 87628321 = 6632^2 + 9361^2 .

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

It is not a de Polignac number, because 131611745 - 2⁴ = 131611729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7100 + ... + 17709.

It is an arithmetic number, because the mean of its divisors is an integer number (19761165).

Almost surely, 2^131611745 is an apocalyptic number.

It is an amenable number.

131611745 is a deficient number, since it is larger than the sum of its proper divisors (26477575).

131611745 is a wasteful number, since it uses less digits than its factorization.

131611745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25875.

The product of its digits is 2520, while the sum is 29.

The square root of 131611745 is about 11472.2162200684. The cubic root of 131611745 is about 508.6646406623.

Adding to 131611745 its reverse (547116131), we get a palindrome (678727876).

The spelling of 131611745 in words is "one hundred thirty-one million, six hundred eleven thousand, seven hundred forty-five".