143449 has 4 divisors (see below), whose sum is σ = 147364. Its totient is φ = 139536.

The previous prime is 143443. The next prime is 143461. The reversal of 143449 is 944341.

143449 = 2² + 3² + ... + 75².

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 85849 + 57600 = 293^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 143449 - 2¹³ = 135257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1902 + ... + 1975.

It is an arithmetic number, because the mean of its divisors is an integer number (36841).

2¹⁴³⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

143449 is a deficient number, since it is larger than the sum of its proper divisors (3915).

143449 is an equidigital number, since it uses as much as digits as its factorization.

143449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914.

The product of its digits is 1728, while the sum is 25.

The square root of 143449 is about 378.7466171466. The cubic root of 143449 is about 52.3478892620.

The spelling of 143449 in words is "one hundred forty-three thousand, four hundred forty-nine".