123818145 has 16 divisors (see below), whose sum is σ = 216119232. Its totient is φ = 60032960.

The previous prime is 123818143. The next prime is 123818159. The reversal of 123818145 is 541818321.

It is not a de Polignac number, because 123818145 - 2¹ = 123818143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

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

It is not an unprimeable number, because it can be changed into a prime (123818143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375042 + ... + 375371.

It is an arithmetic number, because the mean of its divisors is an integer number (13507452).

Almost surely, 2^123818145 is an apocalyptic number.

123818145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123818145 is a deficient number, since it is larger than the sum of its proper divisors (92301087).

123818145 is a wasteful number, since it uses less digits than its factorization.

123818145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750432.

The product of its digits is 7680, while the sum is 33.

The square root of 123818145 is about 11127.3601990769. The cubic root of 123818145 is about 498.4192007478.

The spelling of 123818145 in words is "one hundred twenty-three million, eight hundred eighteen thousand, one hundred forty-five".