102100042 has 24 divisors (see below), whose sum is σ = 169954848. Its totient is φ = 45963720.

The previous prime is 102100007. The next prime is 102100067. The reversal of 102100042 is 240001201.

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 in 11 ways as a sum of consecutive naturals, for example, 23923 + ... + 27865.

It is an arithmetic number, because the mean of its divisors is an integer number (7081452).

Almost surely, 2^102100042 is an apocalyptic number.

102100042 is a deficient number, since it is larger than the sum of its proper divisors (67854806).

102100042 is a wasteful number, since it uses less digits than its factorization.

102100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074 (or 4063 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 102100042 is about 10104.4565415464. The cubic root of 102100042 is about 467.3855775333.

Adding to 102100042 its reverse (240001201), we get a palindrome (342101243).

The spelling of 102100042 in words is "one hundred two million, one hundred thousand, forty-two".