143225405 has 4 divisors (see below), whose sum is σ = 171870492. Its totient is φ = 114580320.

The previous prime is 143225399. The next prime is 143225429. The reversal of 143225405 is 504522341.

It is a happy number.

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 29888089 + 113337316 = 5467^2 + 10646^2 .

It is not a de Polignac number, because 143225405 - 2⁸ = 143225149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14322536 + ... + 14322545.

It is an arithmetic number, because the mean of its divisors is an integer number (42967623).

Almost surely, 2^143225405 is an apocalyptic number.

It is an amenable number.

143225405 is a deficient number, since it is larger than the sum of its proper divisors (28645087).

143225405 is an equidigital number, since it uses as much as digits as its factorization.

143225405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28645086.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 143225405 is about 11967.6816886145. The cubic root of 143225405 is about 523.2067677307.

Adding to 143225405 its reverse (504522341), we get a palindrome (647747746).

The spelling of 143225405 in words is "one hundred forty-three million, two hundred twenty-five thousand, four hundred five".