125678123 has 8 divisors (see below), whose sum is σ = 129863040. Its totient is φ = 121501440.

The previous prime is 125678107. The next prime is 125678209. The reversal of 125678123 is 321876521.

It is a happy number.

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 125678123 - 2⁴ = 125678107 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 (125674123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51413 + ... + 53801.

It is an arithmetic number, because the mean of its divisors is an integer number (16232880).

Almost surely, 2^125678123 is an apocalyptic number.

125678123 is a deficient number, since it is larger than the sum of its proper divisors (4184917).

125678123 is a wasteful number, since it uses less digits than its factorization.

125678123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117.

The product of its digits is 20160, while the sum is 35.

The square root of 125678123 is about 11210.6254508836. The cubic root of 125678123 is about 500.9025338849.

The spelling of 125678123 in words is "one hundred twenty-five million, six hundred seventy-eight thousand, one hundred twenty-three".