124198138 has 4 divisors (see below), whose sum is σ = 186297210. Its totient is φ = 62099068.

The previous prime is 124198093. The next prime is 124198153. The reversal of 124198138 is 831891421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123143409 + 1054729 = 11097^2 + 1027^2 .

It is a junction number, because it is equal to n+sod(n) for n = 124198097 and 124198106.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31049533 + ... + 31049536.

Almost surely, 2^124198138 is an apocalyptic number.

124198138 is a deficient number, since it is larger than the sum of its proper divisors (62099072).

124198138 is an equidigital number, since it uses as much as digits as its factorization.

124198138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62099071.

The product of its digits is 13824, while the sum is 37.

The square root of 124198138 is about 11144.4218333658. The cubic root of 124198138 is about 498.9285563236.

The spelling of 124198138 in words is "one hundred twenty-four million, one hundred ninety-eight thousand, one hundred thirty-eight".