42045973 has 2 divisors, whose sum is σ = 42045974. Its totient is φ = 42045972.

The previous prime is 42045967. The next prime is 42045977. The reversal of 42045973 is 37954024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39463524 + 2582449 = 6282^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 42045973 - 2¹³ = 42037781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42045977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21022986 + 21022987.

It is an arithmetic number, because the mean of its divisors is an integer number (21022987).

Almost surely, 2^42045973 is an apocalyptic number.

It is an amenable number.

42045973 is a deficient number, since it is larger than the sum of its proper divisors (1).

42045973 is an equidigital number, since it uses as much as digits as its factorization.

42045973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 42045973 is about 6484.2866222893. The cubic root of 42045973 is about 347.7294463154.

Adding to 42045973 its reverse (37954024), we get a palindrome (79999997).

The spelling of 42045973 in words is "forty-two million, forty-five thousand, nine hundred seventy-three".