42120102 has 16 divisors (see below), whose sum is σ = 84856752. Its totient is φ = 13937280.

The previous prime is 42120083. The next prime is 42120119. The reversal of 42120102 is 20102124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24799 + ... + 26442.

It is an arithmetic number, because the mean of its divisors is an integer number (5303547).

Almost surely, 2^42120102 is an apocalyptic number.

42120102 is an abundant number, since it is smaller than the sum of its proper divisors (42736650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42120102 is a wasteful number, since it uses less digits than its factorization.

42120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51383.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 42120102 is about 6490.0001540832. Note that the first 3 decimals coincide. The cubic root of 42120102 is about 347.9336807166.

Adding to 42120102 its reverse (20102124), we get a palindrome (62222226).

The spelling of 42120102 in words is "forty-two million, one hundred twenty thousand, one hundred two".