102742106 has 4 divisors (see below), whose sum is σ = 154113162. Its totient is φ = 51371052.

The previous prime is 102742039. The next prime is 102742151. The reversal of 102742106 is 601247201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601247201 = 31 ⋅19395071.

It can be written as a sum of positive squares in only one way, i.e., 79941481 + 22800625 = 8941^2 + 4775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25685525 + ... + 25685528.

Almost surely, 2^102742106 is an apocalyptic number.

102742106 is a deficient number, since it is larger than the sum of its proper divisors (51371056).

102742106 is an equidigital number, since it uses as much as digits as its factorization.

102742106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51371055.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 102742106 is about 10136.1780765730. The cubic root of 102742106 is about 468.3632610767.

Adding to 102742106 its reverse (601247201), we get a palindrome (703989307).

The spelling of 102742106 in words is "one hundred two million, seven hundred forty-two thousand, one hundred six".