42001442 has 8 divisors (see below), whose sum is σ = 72002496. Its totient is φ = 18000612.

The previous prime is 42001397. The next prime is 42001447. The reversal of 42001442 is 24410024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42001442² = 3528242260158728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42001442.

It is not an unprimeable number, because it can be changed into a prime (42001447) 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, 1500038 + ... + 1500065.

It is an arithmetic number, because the mean of its divisors is an integer number (9000312).

Almost surely, 2^42001442 is an apocalyptic number.

42001442 is a deficient number, since it is larger than the sum of its proper divisors (30001054).

42001442 is a wasteful number, since it uses less digits than its factorization.

42001442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000112.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42001442 is about 6480.8519501683. The cubic root of 42001442 is about 347.6066425625.

Adding to 42001442 its reverse (24410024), we get a palindrome (66411466).

The spelling of 42001442 in words is "forty-two million, one thousand, four hundred forty-two".