42040034 has 4 divisors (see below), whose sum is σ = 63060054. Its totient is φ = 21020016.

The previous prime is 42040007. The next prime is 42040051. The reversal of 42040034 is 43004024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 1755625 = 6347^2 + 1325^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42039994 and 42040021.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510007 + ... + 10510010.

Almost surely, 2^42040034 is an apocalyptic number.

42040034 is a deficient number, since it is larger than the sum of its proper divisors (21020020).

42040034 is a wasteful number, since it uses less digits than its factorization.

42040034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21020019.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 42040034 is about 6483.8286528871. The cubic root of 42040034 is about 347.7130732656.

Adding to 42040034 its reverse (43004024), we get a palindrome (85044058).

The spelling of 42040034 in words is "forty-two million, forty thousand, thirty-four", and thus it is an eban number.