126003563 has 8 divisors (see below), whose sum is σ = 144553728. Its totient is φ = 107590824.

The previous prime is 126003557. The next prime is 126003587. The reversal of 126003563 is 365300621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126003563 - 2¹⁴ = 125987179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126003593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32381 + ... + 36062.

It is an arithmetic number, because the mean of its divisors is an integer number (18069216).

Almost surely, 2^126003563 is an apocalyptic number.

126003563 is a deficient number, since it is larger than the sum of its proper divisors (18550165).

126003563 is an equidigital number, since it uses as much as digits as its factorization.

126003563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68713.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 126003563 is about 11225.1308678340. The cubic root of 126003563 is about 501.3345189494.

The spelling of 126003563 in words is "one hundred twenty-six million, three thousand, five hundred sixty-three".