173420405 has 16 divisors (see below), whose sum is σ = 212459520. Its totient is φ = 135862272.

The previous prime is 173420393. The next prime is 173420407. The reversal of 173420405 is 504024371.

It is a cyclic number.

It is not a de Polignac number, because 173420405 - 2¹⁶ = 173354869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173420407) 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, 48437 + ... + 51893.

It is an arithmetic number, because the mean of its divisors is an integer number (13278720).

Almost surely, 2^173420405 is an apocalyptic number.

It is an amenable number.

173420405 is a deficient number, since it is larger than the sum of its proper divisors (39039115).

173420405 is a wasteful number, since it uses less digits than its factorization.

173420405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 173420405 is about 13168.9181408345. The cubic root of 173420405 is about 557.6564529698.

Adding to 173420405 its reverse (504024371), we get a palindrome (677444776).

The spelling of 173420405 in words is "one hundred seventy-three million, four hundred twenty thousand, four hundred five".