423021205 has 4 divisors (see below), whose sum is σ = 507625452. Its totient is φ = 338416960.

The previous prime is 423021191. The next prime is 423021239. The reversal of 423021205 is 502120324.

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 187306596 + 235714609 = 13686^2 + 15353^2 .

It is not a de Polignac number, because 423021205 - 2¹³ = 423013013 is a prime.

It is a Duffinian number.

It is a congruent 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, 42302116 + ... + 42302125.

It is an arithmetic number, because the mean of its divisors is an integer number (126906363).

Almost surely, 2^423021205 is an apocalyptic number.

It is an amenable number.

423021205 is a deficient number, since it is larger than the sum of its proper divisors (84604247).

423021205 is an equidigital number, since it uses as much as digits as its factorization.

423021205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84604246.

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

The square root of 423021205 is about 20567.4793059334. The cubic root of 423021205 is about 750.6786183769.

Adding to 423021205 its reverse (502120324), we get a palindrome (925141529).

The spelling of 423021205 in words is "four hundred twenty-three million, twenty-one thousand, two hundred five".