143405545 has 8 divisors (see below), whose sum is σ = 175333896. Its totient is φ = 112559616.

The previous prime is 143405543. The next prime is 143405623. The reversal of 143405545 is 545504341.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 63696361 + 79709184 = 7981^2 + 8928^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 143405545 - 2¹ = 143405543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143405543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270312 + ... + 270841.

It is an arithmetic number, because the mean of its divisors is an integer number (21916737).

Almost surely, 2^143405545 is an apocalyptic number.

It is an amenable number.

143405545 is a deficient number, since it is larger than the sum of its proper divisors (31928351).

143405545 is an equidigital number, since it uses as much as digits as its factorization.

143405545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541211.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 143405545 is about 11975.2054262129. The cubic root of 143405545 is about 523.4260281350.

Adding to 143405545 its reverse (545504341), we get a palindrome (688909886).

The spelling of 143405545 in words is "one hundred forty-three million, four hundred five thousand, five hundred forty-five".