165143741 has 4 divisors (see below), whose sum is σ = 188735712. Its totient is φ = 141551772.

The previous prime is 165143723. The next prime is 165143743. The reversal of 165143741 is 147341561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165143741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165143698 and 165143707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165143743) 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, 11795975 + ... + 11795988.

It is an arithmetic number, because the mean of its divisors is an integer number (47183928).

Almost surely, 2^165143741 is an apocalyptic number.

It is an amenable number.

165143741 is a deficient number, since it is larger than the sum of its proper divisors (23591971).

165143741 is an equidigital number, since it uses as much as digits as its factorization.

165143741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23591970.

The product of its digits is 10080, while the sum is 32.

The square root of 165143741 is about 12850.8264714765. The cubic root of 165143741 is about 548.6398800416.

The spelling of 165143741 in words is "one hundred sixty-five million, one hundred forty-three thousand, seven hundred forty-one".