131126520 has 128 divisors (see below), whose sum is σ = 461836800. Its totient is φ = 29154816.

The previous prime is 131126509. The next prime is 131126521. The reversal of 131126520 is 25621131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131126521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28971 + ... + 33189.

It is an arithmetic number, because the mean of its divisors is an integer number (3608100).

Almost surely, 2^131126520 is an apocalyptic number.

131126520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131126520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230918400).

131126520 is an abundant number, since it is smaller than the sum of its proper divisors (330710280).

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

131126520 is a wasteful number, since it uses less digits than its factorization.

131126520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4277 (or 4273 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 131126520 is about 11451.0488602573. The cubic root of 131126520 is about 508.0387574538.

Adding to 131126520 its reverse (25621131), we get a palindrome (156747651).

The spelling of 131126520 in words is "one hundred thirty-one million, one hundred twenty-six thousand, five hundred twenty".