131206761 has 48 divisors (see below), whose sum is σ = 232752000. Its totient is φ = 70997472.

The previous prime is 131206741. The next prime is 131206771. The reversal of 131206761 is 167602131.

It is not a de Polignac number, because 131206761 - 2⁹ = 131206249 is a prime.

It is a super-2 number, since 2×131206761² = 34430428264222242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131206711) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57535 + ... + 59771.

It is an arithmetic number, because the mean of its divisors is an integer number (4849000).

Almost surely, 2^131206761 is an apocalyptic number.

It is an amenable number.

131206761 is a deficient number, since it is larger than the sum of its proper divisors (101545239).

131206761 is a wasteful number, since it uses less digits than its factorization.

131206761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 131206761 is about 11454.5519772709. The cubic root of 131206761 is about 508.1423653420.

Adding to 131206761 its reverse (167602131), we get a palindrome (298808892).

It can be divided in two parts, 13120 and 6761, that added together give a square (19881 = 141²).

The spelling of 131206761 in words is "one hundred thirty-one million, two hundred six thousand, seven hundred sixty-one".