42173073 has 12 divisors (see below), whose sum is σ = 64500228. Its totient is φ = 26461440.

The previous prime is 42173059. The next prime is 42173093. The reversal of 42173073 is 37037124.

It can be written as a sum of positive squares in 2 ways, for example, as 39538944 + 2634129 = 6288^2 + 1623^2 .

It is not a de Polignac number, because 42173073 - 2⁴ = 42173057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42173093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137668 + ... + 137973.

It is an arithmetic number, because the mean of its divisors is an integer number (5375019).

Almost surely, 2^42173073 is an apocalyptic number.

It is an amenable number.

42173073 is a deficient number, since it is larger than the sum of its proper divisors (22327155).

42173073 is a wasteful number, since it uses less digits than its factorization.

42173073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275664 (or 275661 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 42173073 is about 6494.0798424411. The cubic root of 42173073 is about 348.0794755065.

The spelling of 42173073 in words is "forty-two million, one hundred seventy-three thousand, seventy-three".