126605131 has 4 divisors (see below), whose sum is σ = 126633472. Its totient is φ = 126576792.

The previous prime is 126605123. The next prime is 126605159. The reversal of 126605131 is 131506621.

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

It is a cyclic number.

It is not a de Polignac number, because 126605131 - 2³ = 126605123 is a prime.

It is a super-2 number, since 2×126605131² = 32057718391054322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126605096 and 126605105.

It is not an unprimeable number, because it can be changed into a prime (126605111) by changing a digit.

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, 5835 + ... + 16948.

It is an arithmetic number, because the mean of its divisors is an integer number (31658368).

Almost surely, 2^126605131 is an apocalyptic number.

126605131 is a deficient number, since it is larger than the sum of its proper divisors (28341).

126605131 is an equidigital number, since it uses as much as digits as its factorization.

126605131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28340.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 126605131 is about 11251.8945515855. The cubic root of 126605131 is about 502.1310787688.

It can be divided in two parts, 126605 and 131, that added together give a square (126736 = 356²).

The spelling of 126605131 in words is "one hundred twenty-six million, six hundred five thousand, one hundred thirty-one".