126403563 has 16 divisors (see below), whose sum is σ = 198003456. Its totient is φ = 70715040.

The previous prime is 126403549. The next prime is 126403567. The reversal of 126403563 is 365304621.

It is not a de Polignac number, because 126403563 - 2⁸ = 126403307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126403563.

It is not an unprimeable number, because it can be changed into a prime (126403567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146895 + ... + 147752.

It is an arithmetic number, because the mean of its divisors is an integer number (12375216).

Almost surely, 2^126403563 is an apocalyptic number.

126403563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

126403563 is a deficient number, since it is larger than the sum of its proper divisors (71599893).

126403563 is a wasteful number, since it uses less digits than its factorization.

126403563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294674.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 126403563 is about 11242.9339142414. The cubic root of 126403563 is about 501.8644562971.

It can be divided in two parts, 12 and 6403563, that multiplied together give a square (76842756 = 8766²).

The spelling of 126403563 in words is "one hundred twenty-six million, four hundred three thousand, five hundred sixty-three".