124220042 has 4 divisors (see below), whose sum is σ = 186330066. Its totient is φ = 62110020.

The previous prime is 124220039. The next prime is 124220053. The reversal of 124220042 is 240022421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240022421 = 19 ⋅12632759.

It can be written as a sum of positive squares in only one way, i.e., 83375161 + 40844881 = 9131^2 + 6391^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 124220042.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31055009 + ... + 31055012.

Almost surely, 2^124220042 is an apocalyptic number.

124220042 is a deficient number, since it is larger than the sum of its proper divisors (62110024).

124220042 is an equidigital number, since it uses as much as digits as its factorization.

124220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62110023.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 124220042 is about 11145.4045238385. The cubic root of 124220042 is about 498.9578855037.

Adding to 124220042 its reverse (240022421), we get a palindrome (364242463).

The spelling of 124220042 in words is "one hundred twenty-four million, two hundred twenty thousand, forty-two".