143845521 has 16 divisors (see below), whose sum is σ = 197040384. Its totient is φ = 93298304.

The previous prime is 143845489. The next prime is 143845531. The reversal of 143845521 is 125548341.

It is a cyclic number.

It is not a de Polignac number, because 143845521 - 2⁵ = 143845489 is a prime.

It is a super-2 number, since 2×143845521² = 41383067823522882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143845531) 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 15 ways as a sum of consecutive naturals, for example, 21445 + ... + 27341.

It is an arithmetic number, because the mean of its divisors is an integer number (12315024).

Almost surely, 2^143845521 is an apocalyptic number.

It is an amenable number.

143845521 is a deficient number, since it is larger than the sum of its proper divisors (53194863).

143845521 is a wasteful number, since it uses less digits than its factorization.

143845521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120.

The product of its digits is 19200, while the sum is 33.

The square root of 143845521 is about 11993.5616478175. The cubic root of 143845521 is about 523.9607814499.

The spelling of 143845521 in words is "one hundred forty-three million, eight hundred forty-five thousand, five hundred twenty-one".