42445252 has 6 divisors (see below), whose sum is σ = 74279198. Its totient is φ = 21222624.

The previous prime is 42445223. The next prime is 42445279. The reversal of 42445252 is 25254424.

It can be written as a sum of positive squares in only one way, i.e., 37136836 + 5308416 = 6094^2 + 2304^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42445252.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305653 + ... + 5305660.

Almost surely, 2^42445252 is an apocalyptic number.

It is an amenable number.

42445252 is a deficient number, since it is larger than the sum of its proper divisors (31833946).

42445252 is a wasteful number, since it uses less digits than its factorization.

42445252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10611317 (or 10611315 counting only the distinct ones).

The product of its digits is 12800, while the sum is 28.

The square root of 42445252 is about 6515.0020721409. The cubic root of 42445252 is about 348.8266887702.

Adding to 42445252 its reverse (25254424), we get a palindrome (67699676).

The spelling of 42445252 in words is "forty-two million, four hundred forty-five thousand, two hundred fifty-two".