42168052 has 12 divisors (see below), whose sum is σ = 74333700. Its totient is φ = 20929856.

The previous prime is 42168037. The next prime is 42168053. The reversal of 42168052 is 25086124.

It can be written as a sum of positive squares in 2 ways, for example, as 26770276 + 15397776 = 5174^2 + 3924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42168052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42168053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37927 + ... + 39022.

It is an arithmetic number, because the mean of its divisors is an integer number (6194475).

Almost surely, 2^42168052 is an apocalyptic number.

It is an amenable number.

42168052 is a deficient number, since it is larger than the sum of its proper divisors (32165648).

42168052 is a wasteful number, since it uses less digits than its factorization.

42168052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77090 (or 77088 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 42168052 is about 6493.6932480677. The cubic root of 42168052 is about 348.0656611910.

The spelling of 42168052 in words is "forty-two million, one hundred sixty-eight thousand, fifty-two".