123858145 has 8 divisors (see below), whose sum is σ = 148743720. Its totient is φ = 99010560.

The previous prime is 123858127. The next prime is 123858167. The reversal of 123858145 is 541858321.

It can be written as a sum of positive squares in 4 ways, for example, as 2505889 + 121352256 = 1583^2 + 11016^2 .

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

It is not a de Polignac number, because 123858145 - 2¹¹ = 123856097 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746 + ... + 15835.

It is an arithmetic number, because the mean of its divisors is an integer number (18592965).

Almost surely, 2^123858145 is an apocalyptic number.

It is an amenable number.

123858145 is a deficient number, since it is larger than the sum of its proper divisors (24885575).

123858145 is a wasteful number, since it uses less digits than its factorization.

123858145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18995.

The product of its digits is 38400, while the sum is 37.

The square root of 123858145 is about 11129.1574254298. The cubic root of 123858145 is about 498.4728671458.

The spelling of 123858145 in words is "one hundred twenty-three million, eight hundred fifty-eight thousand, one hundred forty-five".