42660052 has 6 divisors (see below), whose sum is σ = 74655098. Its totient is φ = 21330024.

The previous prime is 42660031. The next prime is 42660053. The reversal of 42660052 is 25006624.

It can be written as a sum of positive squares in only one way, i.e., 42042256 + 617796 = 6484^2 + 786^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42659999 and 42660026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42660053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332503 + ... + 5332510.

Almost surely, 2^42660052 is an apocalyptic number.

It is an amenable number.

42660052 is a deficient number, since it is larger than the sum of its proper divisors (31995046).

42660052 is a wasteful number, since it uses less digits than its factorization.

42660052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665017 (or 10665015 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 42660052 is about 6531.4662978538. The cubic root of 42660052 is about 349.4141273251.

Adding to 42660052 its reverse (25006624), we get a palindrome (67666676).

The spelling of 42660052 in words is "forty-two million, six hundred sixty thousand, fifty-two".