131260581 has 12 divisors (see below), whose sum is σ = 196621152. Its totient is φ = 87506892.

The previous prime is 131260543. The next prime is 131260589. The reversal of 131260581 is 185062131.

131260581 is a `hidden beast` number, since 13 + 12 + 60 + 581 = 666.

It is not a de Polignac number, because 131260581 - 2¹⁹ = 130736293 is a prime.

It is a super-2 number, since 2×131260581² = 34458680248915122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131260589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 269841 + ... + 270326.

It is an arithmetic number, because the mean of its divisors is an integer number (16385096).

Almost surely, 2^131260581 is an apocalyptic number.

It is an amenable number.

131260581 is a deficient number, since it is larger than the sum of its proper divisors (65360571).

131260581 is an frugal number, since it uses more digits than its factorization.

131260581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540182 (or 540170 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 131260581 is about 11456.9010207822. The cubic root of 131260581 is about 508.2118345355.

It can be divided in two parts, 131260 and 581, that added together give a triangular number (131841 = T₅₁₃).

The spelling of 131260581 in words is "one hundred thirty-one million, two hundred sixty thousand, five hundred eighty-one".