423145 has 4 divisors (see below), whose sum is σ = 507780. Its totient is φ = 338512.

The previous prime is 423133. The next prime is 423173. The reversal of 423145 is 541324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 310249 + 112896 = 557^2 + 336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423145 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42310 + ... + 42319.

It is an arithmetic number, because the mean of its divisors is an integer number (126945).

2⁴²³¹⁴⁵ is an apocalyptic number.

It is an amenable number.

423145 is a deficient number, since it is larger than the sum of its proper divisors (84635).

423145 is an equidigital number, since it uses as much as digits as its factorization.

423145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84634.

The product of its digits is 480, while the sum is 19.

The square root of 423145 is about 650.4959646301. The cubic root of 423145 is about 75.0751838659.

Adding to 423145 its reverse (541324), we get a palindrome (964469).

The spelling of 423145 in words is "four hundred twenty-three thousand, one hundred forty-five".