42645012 has 12 divisors (see below), whose sum is σ = 99505056. Its totient is φ = 14215000.

The previous prime is 42645011. The next prime is 42645017. The reversal of 42645012 is 21054624.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776864 + ... + 1776887.

It is an arithmetic number, because the mean of its divisors is an integer number (8292088).

Almost surely, 2^42645012 is an apocalyptic number.

It is an amenable number.

42645012 is an abundant number, since it is smaller than the sum of its proper divisors (56860044).

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

42645012 is a wasteful number, since it uses less digits than its factorization.

42645012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553758 (or 3553756 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 42645012 is about 6530.3148469274. The cubic root of 42645012 is about 349.3730599726.

Adding to 42645012 its reverse (21054624), we get a palindrome (63699636).

The spelling of 42645012 in words is "forty-two million, six hundred forty-five thousand, twelve".