131125305 has 8 divisors (see below), whose sum is σ = 209800512. Its totient is φ = 69933488.

The previous prime is 131125297. The next prime is 131125307. The reversal of 131125305 is 503521131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131125305 - 2³ = 131125297 is a prime.

It is a super-2 number, since 2×131125305² = 34387691222686050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131125307) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4370829 + ... + 4370858.

It is an arithmetic number, because the mean of its divisors is an integer number (26225064).

Almost surely, 2^131125305 is an apocalyptic number.

131125305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131125305 is a deficient number, since it is larger than the sum of its proper divisors (78675207).

131125305 is an equidigital number, since it uses as much as digits as its factorization.

131125305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8741695.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131125305 is about 11450.9958082256. The cubic root of 131125305 is about 508.0371883103.

Adding to 131125305 its reverse (503521131), we get a palindrome (634646436).

The spelling of 131125305 in words is "one hundred thirty-one million, one hundred twenty-five thousand, three hundred five".