125436563 has 16 divisors (see below), whose sum is σ = 145127424. Its totient is φ = 106198560.

The previous prime is 125436541. The next prime is 125436569. The reversal of 125436563 is 365634521.

It is a cyclic number.

It is not a de Polignac number, because 125436563 - 2⁸ = 125436307 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125436569) 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 15 ways as a sum of consecutive naturals, for example, 341606 + ... + 341972.

It is an arithmetic number, because the mean of its divisors is an integer number (9070464).

Almost surely, 2^125436563 is an apocalyptic number.

125436563 is a deficient number, since it is larger than the sum of its proper divisors (19690861).

125436563 is a wasteful number, since it uses less digits than its factorization.

125436563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842.

The product of its digits is 64800, while the sum is 35.

The square root of 125436563 is about 11199.8465614490. The cubic root of 125436563 is about 500.5814076682.

The spelling of 125436563 in words is "one hundred twenty-five million, four hundred thirty-six thousand, five hundred sixty-three".