42173738 has 8 divisors (see below), whose sum is σ = 63330660. Its totient is φ = 21063520.

The previous prime is 42173723. The next prime is 42173741. The reversal of 42173738 is 83737124.

It can be written as a sum of positive squares in 2 ways, for example, as 41822089 + 351649 = 6467^2 + 593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42173698 and 42173707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9323 + ... + 13086.

Almost surely, 2^42173738 is an apocalyptic number.

42173738 is a deficient number, since it is larger than the sum of its proper divisors (21156922).

42173738 is a wasteful number, since it uses less digits than its factorization.

42173738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23352.

The product of its digits is 28224, while the sum is 35.

The square root of 42173738 is about 6494.1310427185. The cubic root of 42173738 is about 348.0813050438.

The spelling of 42173738 in words is "forty-two million, one hundred seventy-three thousand, seven hundred thirty-eight".