42018501 has 16 divisors (see below), whose sum is σ = 64802304. Its totient is φ = 23720304.

The previous prime is 42018479. The next prime is 42018503. The reversal of 42018501 is 10581024.

It is not a de Polignac number, because 42018501 - 2¹¹ = 42016453 is a prime.

It is a super-3 number, since 3×42018501³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42018503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10311 + ... + 13796.

It is an arithmetic number, because the mean of its divisors is an integer number (4050144).

Almost surely, 2^42018501 is an apocalyptic number.

It is an amenable number.

42018501 is a deficient number, since it is larger than the sum of its proper divisors (22783803).

42018501 is a wasteful number, since it uses less digits than its factorization.

42018501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24200.

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

The square root of 42018501 is about 6482.1679243907. The cubic root of 42018501 is about 347.6536966541.

Adding to 42018501 its reverse (10581024), we get a palindrome (52599525).

The spelling of 42018501 in words is "forty-two million, eighteen thousand, five hundred one".