42445152 has 72 divisors (see below), whose sum is σ = 121356144. Its totient is φ = 14072064.

The previous prime is 42445093. The next prime is 42445153. The reversal of 42445152 is 25154424.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42445153) 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 11 ways as a sum of consecutive naturals, for example, 84133 + ... + 84635.

It is an arithmetic number, because the mean of its divisors is an integer number (1685502).

Almost surely, 2^42445152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42445152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60678072).

42445152 is an abundant number, since it is smaller than the sum of its proper divisors (78910992).

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

42445152 is a wasteful number, since it uses less digits than its factorization.

42445152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 801 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 42445152 is about 6514.9943975417. The cubic root of 42445152 is about 348.8264148275.

Adding to 42445152 its reverse (25154424), we get a palindrome (67599576).

The spelling of 42445152 in words is "forty-two million, four hundred forty-five thousand, one hundred fifty-two".