42042042 has 24 divisors (see below), whose sum is σ = 104104416. Its totient is φ = 12011976.

The previous prime is 42042023. The next prime is 42042053. The reversal of 42042042 is 24024024.

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

42042042 is a modest number, since divided by 42042 gives 42 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166708 + ... + 166959.

It is an arithmetic number, because the mean of its divisors is an integer number (4337684).

Almost surely, 2^42042042 is an apocalyptic number.

42042042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42042042 is an abundant number, since it is smaller than the sum of its proper divisors (62062374).

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

42042042 is a wasteful number, since it uses less digits than its factorization.

42042042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333682 (or 333679 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42042042 is about 6483.9834978198. The cubic root of 42042042 is about 347.7186092327.

Adding to 42042042 its reverse (24024024), we get a palindrome (66066066).

The spelling of 42042042 in words is "forty-two million, forty-two thousand, forty-two", and thus it is an eban number.