42102142 has 12 divisors (see below), whose sum is σ = 65408616. Its totient is φ = 20324360.

The previous prime is 42102133. The next prime is 42102143. The reversal of 42102142 is 24120124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42102143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10834 + ... + 14197.

It is an arithmetic number, because the mean of its divisors is an integer number (5450718).

Almost surely, 2^42102142 is an apocalyptic number.

42102142 is a deficient number, since it is larger than the sum of its proper divisors (23306474).

42102142 is a wasteful number, since it uses less digits than its factorization.

42102142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25091 (or 25062 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 42102142 is about 6488.6163394055. The cubic root of 42102142 is about 347.8842207439.

Adding to 42102142 its reverse (24120124), we get a palindrome (66222266).

The spelling of 42102142 in words is "forty-two million, one hundred two thousand, one hundred forty-two".