131426005 has 4 divisors (see below), whose sum is σ = 157711212. Its totient is φ = 105140800.

The previous prime is 131425993. The next prime is 131426023. The reversal of 131426005 is 500624131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17918289 + 113507716 = 4233^2 + 10654^2 .

It is not a de Polignac number, because 131426005 - 2²¹ = 129328853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13142596 + ... + 13142605.

It is an arithmetic number, because the mean of its divisors is an integer number (39427803).

Almost surely, 2^131426005 is an apocalyptic number.

It is an amenable number.

131426005 is a deficient number, since it is larger than the sum of its proper divisors (26285207).

131426005 is an equidigital number, since it uses as much as digits as its factorization.

131426005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26285206.

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

The square root of 131426005 is about 11464.1181518685. The cubic root of 131426005 is about 508.4252399143.

The spelling of 131426005 in words is "one hundred thirty-one million, four hundred twenty-six thousand, five".