125563 has 4 divisors (see below), whose sum is σ = 126280. Its totient is φ = 124848.

The previous prime is 125551. The next prime is 125591. The reversal of 125563 is 365521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(125563) divides (125563-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 125563 - 2¹³ = 117371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103 + ... + 511.

It is an arithmetic number, because the mean of its divisors is an integer number (31570).

2¹²⁵⁵⁶³ is an apocalyptic number.

125563 is a deficient number, since it is larger than the sum of its proper divisors (717).

125563 is an equidigital number, since it uses as much as digits as its factorization.

125563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its digits is 900, while the sum is 22.

The square root of 125563 is about 354.3486983185. The cubic root of 125563 is about 50.0749542477.

The spelling of 125563 in words is "one hundred twenty-five thousand, five hundred sixty-three".