143542521 has 12 divisors (see below), whose sum is σ = 207507300. Its totient is φ = 95617440.

The previous prime is 143542519. The next prime is 143542537. The reversal of 143542521 is 125245341.

It can be written as a sum of positive squares in 2 ways, for example, as 109495296 + 34047225 = 10464^2 + 5835^2 .

It is not a de Polignac number, because 143542521 - 2¹ = 143542519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143542541) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6655 + ... + 18203.

It is an arithmetic number, because the mean of its divisors is an integer number (17292275).

Almost surely, 2^143542521 is an apocalyptic number.

It is an amenable number.

143542521 is a deficient number, since it is larger than the sum of its proper divisors (63964779).

143542521 is a wasteful number, since it uses less digits than its factorization.

143542521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12936 (or 12933 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 143542521 is about 11980.9232115059. The cubic root of 143542521 is about 523.5926278954.

Adding to 143542521 its reverse (125245341), we get a palindrome (268787862).

It can be divided in two parts, 1435 and 42521, that added together give a triangular number (43956 = T₂₉₆).

The spelling of 143542521 in words is "one hundred forty-three million, five hundred forty-two thousand, five hundred twenty-one".