42145452 has 18 divisors (see below), whose sum is σ = 106534428. Its totient is φ = 14048472.

The previous prime is 42145429. The next prime is 42145457. The reversal of 42145452 is 25454124.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (42145457) 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 5 ways as a sum of consecutive naturals, for example, 585318 + ... + 585389.

Almost surely, 2^42145452 is an apocalyptic number.

It is an amenable number.

42145452 is an abundant number, since it is smaller than the sum of its proper divisors (64388976).

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

42145452 is a wasteful number, since it uses less digits than its factorization.

42145452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170717 (or 1170712 counting only the distinct ones).

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

The square root of 42145452 is about 6491.9528648936. The cubic root of 42145452 is about 348.0034680590.

Adding to 42145452 its reverse (25454124), we get a palindrome (67599576).

The spelling of 42145452 in words is "forty-two million, one hundred forty-five thousand, four hundred fifty-two".