126864505 has 4 divisors (see below), whose sum is σ = 152237412. Its totient is φ = 101491600.

The previous prime is 126864499. The next prime is 126864559. The reversal of 126864505 is 505468621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505468621 = 7 ⋅72209803.

It can be written as a sum of positive squares in 2 ways, for example, as 94420089 + 32444416 = 9717^2 + 5696^2 .

It is not a de Polignac number, because 126864505 - 2⁹ = 126863993 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12686446 + ... + 12686455.

It is an arithmetic number, because the mean of its divisors is an integer number (38059353).

Almost surely, 2^126864505 is an apocalyptic number.

It is an amenable number.

126864505 is a deficient number, since it is larger than the sum of its proper divisors (25372907).

126864505 is an equidigital number, since it uses as much as digits as its factorization.

126864505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25372906.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 126864505 is about 11263.4144467830. The cubic root of 126864505 is about 502.4737476281.

The spelling of 126864505 in words is "one hundred twenty-six million, eight hundred sixty-four thousand, five hundred five".