124200018 has 12 divisors (see below), whose sum is σ = 269100078. Its totient is φ = 41400000.

The previous prime is 124199983. The next prime is 124200019. The reversal of 124200018 is 810002421.

It can be written as a sum of positive squares in only one way, i.e., 121286169 + 2913849 = 11013^2 + 1707^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 6900001 = 124200018 / (1 + 2 + 4 + 2 + 0 + 0 + 0 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (124200019) 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 5 ways as a sum of consecutive naturals, for example, 3449983 + ... + 3450018.

Almost surely, 2^124200018 is an apocalyptic number.

124200018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

124200018 is an abundant number, since it is smaller than the sum of its proper divisors (144900060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

124200018 is a wasteful number, since it uses less digits than its factorization.

124200018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900009 (or 6900006 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 124200018 is about 11144.5061801768. The cubic root of 124200018 is about 498.9310737552.

Adding to 124200018 its reverse (810002421), we get a palindrome (934202439).

The spelling of 124200018 in words is "one hundred twenty-four million, two hundred thousand, eighteen".