423120145 has 12 divisors (see below), whose sum is σ = 590641524. Its totient is φ = 290139360.

The previous prime is 423120143. The next prime is 423120149. The reversal of 423120145 is 541021324.

It can be written as a sum of positive squares in 2 ways, for example, as 226924096 + 196196049 = 15064^2 + 14007^2 .

It is not a de Polignac number, because 423120145 - 2¹ = 423120143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423120143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863266 + ... + 863755.

It is an arithmetic number, because the mean of its divisors is an integer number (49220127).

Almost surely, 2^423120145 is an apocalyptic number.

It is an amenable number.

423120145 is a deficient number, since it is larger than the sum of its proper divisors (167521379).

423120145 is a wasteful number, since it uses less digits than its factorization.

423120145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727040 (or 1727033 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 423120145 is about 20569.8844187322. The cubic root of 423120145 is about 750.7371389679.

Adding to 423120145 its reverse (541021324), we get a palindrome (964141469).

The spelling of 423120145 in words is "four hundred twenty-three million, one hundred twenty thousand, one hundred forty-five".