102668042 has 4 divisors (see below), whose sum is σ = 154002066. Its totient is φ = 51334020.

The previous prime is 102668023. The next prime is 102668051. The reversal of 102668042 is 240866201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240866201 = 73 ⋅3299537.

It can be written as a sum of positive squares in only one way, i.e., 77457601 + 25210441 = 8801^2 + 5021^2 .

It is a super-4 number, since 4×102668042⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 102667996 and 102668014.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25667009 + ... + 25667012.

Almost surely, 2^102668042 is an apocalyptic number.

102668042 is a deficient number, since it is larger than the sum of its proper divisors (51334024).

102668042 is an equidigital number, since it uses as much as digits as its factorization.

102668042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51334023.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 102668042 is about 10132.5239698705. The cubic root of 102668042 is about 468.2506905618.

The spelling of 102668042 in words is "one hundred two million, six hundred sixty-eight thousand, forty-two".