423155 has 4 divisors (see below), whose sum is σ = 507792. Its totient is φ = 338520.

The previous prime is 423133. The next prime is 423173. The reversal of 423155 is 551324.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 423155 - 2⁶ = 423091 is a prime.

It is a Duffinian number.

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, 42311 + ... + 42320.

It is an arithmetic number, because the mean of its divisors is an integer number (126948).

2⁴²³¹⁵⁵ is an apocalyptic number.

423155 is a deficient number, since it is larger than the sum of its proper divisors (84637).

423155 is an equidigital number, since it uses as much as digits as its factorization.

423155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84636.

The product of its digits is 600, while the sum is 20.

The square root of 423155 is about 650.5036510274. The cubic root of 423155 is about 75.0757752675.

Adding to 423155 its reverse (551324), we get a palindrome (974479).

It can be divided in two parts, 42315 and 5, that multiplied together give a triangular number (211575 = T₆₅₀).

The spelling of 423155 in words is "four hundred twenty-three thousand, one hundred fifty-five".