42012073 has 2 divisors, whose sum is σ = 42012074. Its totient is φ = 42012072.

The previous prime is 42012017. The next prime is 42012077. The reversal of 42012073 is 37021024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29073664 + 12938409 = 5392^2 + 3597^2 .

It is a cyclic number.

It is not a de Polignac number, because 42012073 - 2²¹ = 39914921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42012073.

It is not a weakly prime, because it can be changed into another prime (42012077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006036 + 21006037.

It is an arithmetic number, because the mean of its divisors is an integer number (21006037).

Almost surely, 2^42012073 is an apocalyptic number.

It is an amenable number.

42012073 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012073 is an equidigital number, since it uses as much as digits as its factorization.

42012073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 42012073 is about 6481.6720836525. The cubic root of 42012073 is about 347.6359677023.

Adding to 42012073 its reverse (37021024), we get a palindrome (79033097).

The spelling of 42012073 in words is "forty-two million, twelve thousand, seventy-three".