42740073 has 12 divisors (see below), whose sum is σ = 62079108. Its totient is φ = 28334880.

The previous prime is 42740059. The next prime is 42740107. The reversal of 42740073 is 37004724.

It can be written as a sum of positive squares in 2 ways, for example, as 2442969 + 40297104 = 1563^2 + 6348^2 .

It is not a de Polignac number, because 42740073 - 2⁸ = 42739817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42740053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11490 + ... + 14747.

It is an arithmetic number, because the mean of its divisors is an integer number (5173259).

Almost surely, 2^42740073 is an apocalyptic number.

It is an amenable number.

42740073 is a deficient number, since it is larger than the sum of its proper divisors (19339035).

42740073 is a wasteful number, since it uses less digits than its factorization.

42740073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26424 (or 26421 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 42740073 is about 6537.5892345726. The cubic root of 42740073 is about 349.6324658891.

Adding to 42740073 its reverse (37004724), we get a palindrome (79744797).

It can be divided in two parts, 427 and 40073, that multiplied together give a palindrome (17111171).

The spelling of 42740073 in words is "forty-two million, seven hundred forty thousand, seventy-three".