126126005 has 4 divisors (see below), whose sum is σ = 151351212. Its totient is φ = 100900800.

The previous prime is 126125999. The next prime is 126126019. The reversal of 126126005 is 500621621.

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 40729924 + 85396081 = 6382^2 + 9241^2 .

It is not a de Polignac number, because 126126005 - 2¹⁰ = 126124981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12612596 + ... + 12612605.

It is an arithmetic number, because the mean of its divisors is an integer number (37837803).

Almost surely, 2^126126005 is an apocalyptic number.

It is an amenable number.

126126005 is a deficient number, since it is larger than the sum of its proper divisors (25225207).

126126005 is an equidigital number, since it uses as much as digits as its factorization.

126126005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25225206.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 126126005 is about 11230.5834665880. The cubic root of 126126005 is about 501.4968543822.

Adding to 126126005 its reverse (500621621), we get a palindrome (626747626).

The spelling of 126126005 in words is "one hundred twenty-six million, one hundred twenty-six thousand, five".