42102342 has 40 divisors (see below), whose sum is σ = 94769136. Its totient is φ = 13970448.

The previous prime is 42102317. The next prime is 42102343. The reversal of 42102342 is 24320124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42102343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47023 + ... + 47909.

Almost surely, 2^42102342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42102342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47384568).

42102342 is an abundant number, since it is smaller than the sum of its proper divisors (52666794).

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

42102342 is a wasteful number, since it uses less digits than its factorization.

42102342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194 (or 1185 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42102342 is about 6488.6317509934. The cubic root of 42102342 is about 347.8847716005.

Adding to 42102342 its reverse (24320124), we get a palindrome (66422466).

The spelling of 42102342 in words is "forty-two million, one hundred two thousand, three hundred forty-two".