131240105 has 8 divisors (see below), whose sum is σ = 157936392. Its totient is φ = 104693248.

The previous prime is 131240099. The next prime is 131240113. The reversal of 131240105 is 501042131.

It can be written as a sum of positive squares in 4 ways, for example, as 169 + 131239936 = 13^2 + 11456^2 .

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 131240105 - 2⁶ = 131240041 is a prime.

It is a super-2 number, since 2×131240105² = 34447930320822050, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 35414 + ... + 38943.

It is an arithmetic number, because the mean of its divisors is an integer number (19742049).

Almost surely, 2^131240105 is an apocalyptic number.

It is an amenable number.

131240105 is a deficient number, since it is larger than the sum of its proper divisors (26696287).

131240105 is an equidigital number, since it uses as much as digits as its factorization.

131240105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74715.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 131240105 is about 11456.0073760451. The cubic root of 131240105 is about 508.1854069856.

Adding to 131240105 its reverse (501042131), we get a palindrome (632282236).

The spelling of 131240105 in words is "one hundred thirty-one million, two hundred forty thousand, one hundred five".