42672173 has 2 divisors, whose sum is σ = 42672174. Its totient is φ = 42672172.

The previous prime is 42672101. The next prime is 42672181. The reversal of 42672173 is 37127624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41822089 + 850084 = 6467^2 + 922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42672173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42678173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21336086 + 21336087.

It is an arithmetic number, because the mean of its divisors is an integer number (21336087).

Almost surely, 2^42672173 is an apocalyptic number.

It is an amenable number.

42672173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42672173 is an equidigital number, since it uses as much as digits as its factorization.

42672173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 32.

The square root of 42672173 is about 6532.3941246682. The cubic root of 42672173 is about 349.4472172018.

Adding to 42672173 its reverse (37127624), we get a palindrome (79799797).

The spelling of 42672173 in words is "forty-two million, six hundred seventy-two thousand, one hundred seventy-three".