42420052 has 6 divisors (see below), whose sum is σ = 74235098. Its totient is φ = 21210024.

The previous prime is 42420031. The next prime is 42420067. The reversal of 42420052 is 25002424.

It can be written as a sum of positive squares in only one way, i.e., 41525136 + 894916 = 6444^2 + 946^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5302503 + ... + 5302510.

Almost surely, 2^42420052 is an apocalyptic number.

It is an amenable number.

42420052 is a deficient number, since it is larger than the sum of its proper divisors (31815046).

42420052 is a wasteful number, since it uses less digits than its factorization.

42420052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10605017 (or 10605015 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42420052 is about 6513.0677871492. The cubic root of 42420052 is about 348.7576416066.

Adding to 42420052 its reverse (25002424), we get a palindrome (67422476).

The spelling of 42420052 in words is "forty-two million, four hundred twenty thousand, fifty-two".