131305734 has 24 divisors (see below), whose sum is σ = 325138320. Its totient is φ = 37515888.

The previous prime is 131305723. The next prime is 131305771. The reversal of 131305734 is 437503131.

It is a junction number, because it is equal to n+sod(n) for n = 131305698 and 131305707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 520929 + ... + 521180.

It is an arithmetic number, because the mean of its divisors is an integer number (13547430).

Almost surely, 2^131305734 is an apocalyptic number.

131305734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

131305734 is an abundant number, since it is smaller than the sum of its proper divisors (193832586).

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

131305734 is a wasteful number, since it uses less digits than its factorization.

131305734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042124 (or 1042121 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 131305734 is about 11458.8714103964. The cubic root of 131305734 is about 508.2701019860.

Adding to 131305734 its reverse (437503131), we get a palindrome (568808865).

The spelling of 131305734 in words is "one hundred thirty-one million, three hundred five thousand, seven hundred thirty-four".