126438505 has 4 divisors (see below), whose sum is σ = 151726212. Its totient is φ = 101150800.

The previous prime is 126438497. The next prime is 126438511. The reversal of 126438505 is 505834621.

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 26378496 + 100060009 = 5136^2 + 10003^2 .

It is not a de Polignac number, because 126438505 - 2³ = 126438497 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 12643846 + ... + 12643855.

It is an arithmetic number, because the mean of its divisors is an integer number (37931553).

Almost surely, 2^126438505 is an apocalyptic number.

It is an amenable number.

126438505 is a deficient number, since it is larger than the sum of its proper divisors (25287707).

126438505 is an equidigital number, since it uses as much as digits as its factorization.

126438505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25287706.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 126438505 is about 11244.4877606763. The cubic root of 126438505 is about 501.9106958488.

The spelling of 126438505 in words is "one hundred twenty-six million, four hundred thirty-eight thousand, five hundred five".