42018015 has 32 divisors (see below), whose sum is σ = 72930816. Its totient is φ = 20534400.

The previous prime is 42018001. The next prime is 42018017. The reversal of 42018015 is 51081024.

It is not a de Polignac number, because 42018015 - 2¹³ = 42009823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42017982 and 42018000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42018017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28732 + ... + 30158.

It is an arithmetic number, because the mean of its divisors is an integer number (2279088).

Almost surely, 2^42018015 is an apocalyptic number.

42018015 is a deficient number, since it is larger than the sum of its proper divisors (30912801).

42018015 is a wasteful number, since it uses less digits than its factorization.

42018015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 42018015 is about 6482.1304368240. The cubic root of 42018015 is about 347.6523562893.

Adding to 42018015 its reverse (51081024), we get a palindrome (93099039).

The spelling of 42018015 in words is "forty-two million, eighteen thousand, fifteen".