42509052 has 18 divisors (see below), whose sum is σ = 107453528. Its totient is φ = 14169672.

The previous prime is 42509039. The next prime is 42509053. The reversal of 42509052 is 25090524.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42509053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 590368 + ... + 590439.

Almost surely, 2^42509052 is an apocalyptic number.

It is an amenable number.

42509052 is an abundant number, since it is smaller than the sum of its proper divisors (64944476).

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

42509052 is a wasteful number, since it uses less digits than its factorization.

42509052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180817 (or 1180812 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 42509052 is about 6519.8966249474. The cubic root of 42509052 is about 349.0013765569.

Adding to 42509052 its reverse (25090524), we get a palindrome (67599576).

It can be divided in two parts, 4 and 2509052, that added together give a square (2509056 = 1584²).

The spelling of 42509052 in words is "forty-two million, five hundred nine thousand, fifty-two".