143145557 has 4 divisors (see below), whose sum is σ = 143357676. Its totient is φ = 142933440.

The previous prime is 143145539. The next prime is 143145577. The reversal of 143145557 is 755541341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755541341 = 53 ⋅14255497.

It can be written as a sum of positive squares in 2 ways, for example, as 75099556 + 68046001 = 8666^2 + 8249^2 .

It is a cyclic number.

It is not a de Polignac number, because 143145557 - 2²⁶ = 76036693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143145517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105044 + ... + 106397.

It is an arithmetic number, because the mean of its divisors is an integer number (35839419).

Almost surely, 2^143145557 is an apocalyptic number.

It is an amenable number.

143145557 is a deficient number, since it is larger than the sum of its proper divisors (212119).

143145557 is an equidigital number, since it uses as much as digits as its factorization.

143145557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212118.

The product of its digits is 42000, while the sum is 35.

The square root of 143145557 is about 11964.3452390843. The cubic root of 143145557 is about 523.1095205979.

Adding to 143145557 its reverse (755541341), we get a palindrome (898686898).

The spelling of 143145557 in words is "one hundred forty-three million, one hundred forty-five thousand, five hundred fifty-seven".