42150042 has 48 divisors (see below), whose sum is σ = 100234368. Its totient is φ = 12695040.

The previous prime is 42150029. The next prime is 42150047. The reversal of 42150042 is 24005124.

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

It is a junction number, because it is equal to n+sod(n) for n = 42149997 and 42150024.

It is not an unprimeable number, because it can be changed into a prime (42150047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37663 + ... + 38765.

It is an arithmetic number, because the mean of its divisors is an integer number (2088216).

Almost surely, 2^42150042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42150042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50117184).

42150042 is an abundant number, since it is smaller than the sum of its proper divisors (58084326).

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

42150042 is a wasteful number, since it uses less digits than its factorization.

42150042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42150042 is about 6492.3063698504. The cubic root of 42150042 is about 348.0161011179.

Adding to 42150042 its reverse (24005124), we get a palindrome (66155166).

The spelling of 42150042 in words is "forty-two million, one hundred fifty thousand, forty-two".