131207605 has 4 divisors (see below), whose sum is σ = 157449132. Its totient is φ = 104966080.

The previous prime is 131207579. The next prime is 131207623. The reversal of 131207605 is 506702131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75047569 + 56160036 = 8663^2 + 7494^2 .

It is not a de Polignac number, because 131207605 - 2¹⁵ = 131174837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131207605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13120756 + ... + 13120765.

It is an arithmetic number, because the mean of its divisors is an integer number (39362283).

Almost surely, 2^131207605 is an apocalyptic number.

It is an amenable number.

131207605 is a deficient number, since it is larger than the sum of its proper divisors (26241527).

131207605 is an equidigital number, since it uses as much as digits as its factorization.

131207605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26241526.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 131207605 is about 11454.5888184605. The cubic root of 131207605 is about 508.1434548977.

Adding to 131207605 its reverse (506702131), we get a palindrome (637909736).

The spelling of 131207605 in words is "one hundred thirty-one million, two hundred seven thousand, six hundred five".