42006040 has 16 divisors (see below), whose sum is σ = 94513680. Its totient is φ = 16802400.

The previous prime is 42006037. The next prime is 42006049. The reversal of 42006040 is 4060024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42006049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525036 + ... + 525115.

It is an arithmetic number, because the mean of its divisors is an integer number (5907105).

Almost surely, 2^42006040 is an apocalyptic number.

42006040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42006040 is an abundant number, since it is smaller than the sum of its proper divisors (52507640).

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

42006040 is a wasteful number, since it uses less digits than its factorization.

42006040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050162 (or 1050158 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42006040 is about 6481.2066777723. The cubic root of 42006040 is about 347.6193265478.

Adding to 42006040 its reverse (4060024), we get a palindrome (46066064).

The spelling of 42006040 in words is "forty-two million, six thousand, forty", and thus it is an eban number.