143561 has 8 divisors (see below), whose sum is σ = 162048. Its totient is φ = 126000.

The previous prime is 143551. The next prime is 143567. The reversal of 143561 is 165341.

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 143561 - 2¹⁰ = 142537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143567) 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 7 ways as a sum of consecutive naturals, for example, 131 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (20256).

2¹⁴³⁵⁶¹ is an apocalyptic number.

143561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

143561 is a deficient number, since it is larger than the sum of its proper divisors (18487).

143561 is a wasteful number, since it uses less digits than its factorization.

143561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its digits is 360, while the sum is 20.

The square root of 143561 is about 378.8944444037. The cubic root of 143561 is about 52.3615095229.

The spelling of 143561 in words is "one hundred forty-three thousand, five hundred sixty-one".