131405260 has 36 divisors (see below), whose sum is σ = 321006672. Its totient is φ = 45052896.

The previous prime is 131405251. The next prime is 131405297. The reversal of 131405260 is 62504131.

It is a super-4 number, since 4×131405260⁴ (a number of 34 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66064 + ... + 68023.

It is an arithmetic number, because the mean of its divisors is an integer number (8916852).

Almost surely, 2^131405260 is an apocalyptic number.

131405260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131405260 is an abundant number, since it is smaller than the sum of its proper divisors (189601412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131405260 is a wasteful number, since it uses less digits than its factorization.

131405260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134110 (or 134101 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131405260 is about 11463.2133365824. The cubic root of 131405260 is about 508.3984876324.

Adding to 131405260 its reverse (62504131), we get a palindrome (193909391).

The spelling of 131405260 in words is "one hundred thirty-one million, four hundred five thousand, two hundred sixty".