42645434 has 16 divisors (see below), whose sum is σ = 68998272. Its totient is φ = 19651248.

The previous prime is 42645397. The next prime is 42645437. The reversal of 42645434 is 43454624.

It is a self number, because there is not a number n which added to its sum of digits gives 42645434.

It is not an unprimeable number, because it can be changed into a prime (42645437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26867 + ... + 28409.

It is an arithmetic number, because the mean of its divisors is an integer number (4312392).

Almost surely, 2^42645434 is an apocalyptic number.

42645434 is a deficient number, since it is larger than the sum of its proper divisors (26352838).

42645434 is a wasteful number, since it uses less digits than its factorization.

42645434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its digits is 46080, while the sum is 32.

The square root of 42645434 is about 6530.3471576938. The cubic root of 42645434 is about 349.3742123930.

The spelling of 42645434 in words is "forty-two million, six hundred forty-five thousand, four hundred thirty-four".