126273563 has 32 divisors (see below), whose sum is σ = 151045440. Its totient is φ = 104509440.

The previous prime is 126273551. The next prime is 126273619. The reversal of 126273563 is 365372621.

It is a cyclic number.

It is not a de Polignac number, because 126273563 - 2⁸ = 126273307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126273503) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 374531 + ... + 374867.

It is an arithmetic number, because the mean of its divisors is an integer number (4720170).

Almost surely, 2^126273563 is an apocalyptic number.

126273563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126273563 is a deficient number, since it is larger than the sum of its proper divisors (24771877).

126273563 is a wasteful number, since it uses less digits than its factorization.

126273563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447.

The product of its digits is 45360, while the sum is 35.

The square root of 126273563 is about 11237.1510179404. The cubic root of 126273563 is about 501.6923494441.

The spelling of 126273563 in words is "one hundred twenty-six million, two hundred seventy-three thousand, five hundred sixty-three".