123602168042 has 16 divisors (see below), whose sum is σ = 187439042952. Its totient is φ = 61123795200.

The previous prime is 123602168023. The next prime is 123602168051. The reversal of 123602168042 is 240861206321.

It is a Cunningham number, because it is equal to 351571²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 123602168041 + 1 = 351571^2 + 1^2 .

It is a super-2 number, since 2×123602168042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123602167993 and 123602168011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137243 + ... + 515790.

Almost surely, 2^123602168042 is an apocalyptic number.

123602168042 is a deficient number, since it is larger than the sum of its proper divisors (63836874910).

123602168042 is a wasteful number, since it uses less digits than its factorization.

123602168042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654073.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 123602168042 in words is "one hundred twenty-three billion, six hundred two million, one hundred sixty-eight thousand, forty-two".