42001434 has 24 divisors (see below), whose sum is σ = 91128180. Its totient is φ = 13981248.

The previous prime is 42001397. The next prime is 42001447. The reversal of 42001434 is 43410024.

It can be written as a sum of positive squares in 2 ways, for example, as 41796225 + 205209 = 6465^2 + 453^2 .

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

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, 19062 + ... + 21150.

Almost surely, 2^42001434 is an apocalyptic number.

42001434 is an abundant number, since it is smaller than the sum of its proper divisors (49126746).

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

42001434 is a wasteful number, since it uses less digits than its factorization.

42001434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214 (or 3211 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42001434 is about 6480.8513329654. The cubic root of 42001434 is about 347.6066204930.

Adding to 42001434 its reverse (43410024), we get a palindrome (85411458).

The spelling of 42001434 in words is "forty-two million, one thousand, four hundred thirty-four".