143611 has 4 divisors (see below), whose sum is σ = 154672. Its totient is φ = 132552.

The previous prime is 143609. The next prime is 143617. The reversal of 143611 is 116341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 143611 - 2¹ = 143609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5511 + ... + 5536.

It is an arithmetic number, because the mean of its divisors is an integer number (38668).

2¹⁴³⁶¹¹ is an apocalyptic number.

143611 is a deficient number, since it is larger than the sum of its proper divisors (11061).

143611 is a wasteful number, since it uses less digits than its factorization.

143611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11060.

The product of its digits is 72, while the sum is 16.

The square root of 143611 is about 378.9604200969. The cubic root of 143611 is about 52.3675877094.

Adding to 143611 its reverse (116341), we get a palindrome (259952).

The spelling of 143611 in words is "one hundred forty-three thousand, six hundred eleven".