42173345 has 16 divisors (see below), whose sum is σ = 53923968. Its totient is φ = 31553280.

The previous prime is 42173333. The next prime is 42173347. The reversal of 42173345 is 54337124.

It is a happy number.

It is not a de Polignac number, because 42173345 - 2¹⁰ = 42172321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42173347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12710 + ... + 15680.

It is an arithmetic number, because the mean of its divisors is an integer number (3370248).

Almost surely, 2^42173345 is an apocalyptic number.

It is an amenable number.

42173345 is a deficient number, since it is larger than the sum of its proper divisors (11750623).

42173345 is a wasteful number, since it uses less digits than its factorization.

42173345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160.

The product of its digits is 10080, while the sum is 29.

The square root of 42173345 is about 6494.1007845582. The cubic root of 42173345 is about 348.0802238309.

The spelling of 42173345 in words is "forty-two million, one hundred seventy-three thousand, three hundred forty-five".