125638523 has 8 divisors (see below), whose sum is σ = 127456560. Its totient is φ = 123832800.

The previous prime is 125638477. The next prime is 125638531. The reversal of 125638523 is 325836521.

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 125638523 - 2¹² = 125634427 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 (125638543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18548 + ... + 24398.

It is an arithmetic number, because the mean of its divisors is an integer number (15932070).

Almost surely, 2^125638523 is an apocalyptic number.

125638523 is a deficient number, since it is larger than the sum of its proper divisors (1818037).

125638523 is a wasteful number, since it uses less digits than its factorization.

125638523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157.

The product of its digits is 43200, while the sum is 35.

The square root of 125638523 is about 11208.8591301702. The cubic root of 125638523 is about 500.8499184586.

The spelling of 125638523 in words is "one hundred twenty-five million, six hundred thirty-eight thousand, five hundred twenty-three".