131207746 has 8 divisors (see below), whose sum is σ = 197134524. Its totient is φ = 65496240.

The previous prime is 131207743. The next prime is 131207759. The reversal of 131207746 is 647702131.

It can be written as a sum of positive squares in 2 ways, for example, as 80299521 + 50908225 = 8961^2 + 7135^2 .

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

It is a super-2 number, since 2×131207746² = 34430945220801032, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 52285 + ... + 54736.

Almost surely, 2^131207746 is an apocalyptic number.

131207746 is a deficient number, since it is larger than the sum of its proper divisors (65926778).

131207746 is a wasteful number, since it uses less digits than its factorization.

131207746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107636.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 131207746 is about 11454.5949731974. The cubic root of 131207746 is about 508.1436369202.

Adding to 131207746 its reverse (647702131), we get a palindrome (778909877).

The spelling of 131207746 in words is "one hundred thirty-one million, two hundred seven thousand, seven hundred forty-six".