42820012 has 6 divisors (see below), whose sum is σ = 74935028. Its totient is φ = 21410004.

The previous prime is 42820007. The next prime is 42820013. The reversal of 42820012 is 21002824.

It is not an unprimeable number, because it can be changed into a prime (42820013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5352498 + ... + 5352505.

Almost surely, 2^42820012 is an apocalyptic number.

It is an amenable number.

42820012 is a deficient number, since it is larger than the sum of its proper divisors (32115016).

42820012 is a wasteful number, since it uses less digits than its factorization.

42820012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10705007 (or 10705005 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 42820012 is about 6543.7001765056. The cubic root of 42820012 is about 349.8503087769.

Adding to 42820012 its reverse (21002824), we get a palindrome (63822836).

The spelling of 42820012 in words is "forty-two million, eight hundred twenty thousand, twelve".