141665543 has 4 divisors (see below), whose sum is σ = 141746520. Its totient is φ = 141584568.

The previous prime is 141665527. The next prime is 141665591. The reversal of 141665543 is 345566141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345566141 = 2311 ⋅149531.

It is a cyclic number.

It is not a de Polignac number, because 141665543 - 2⁴ = 141665527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141665593) 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, 37805 + ... + 41382.

It is an arithmetic number, because the mean of its divisors is an integer number (35436630).

Almost surely, 2^141665543 is an apocalyptic number.

141665543 is a deficient number, since it is larger than the sum of its proper divisors (80977).

141665543 is an equidigital number, since it uses as much as digits as its factorization.

141665543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80976.

The product of its digits is 43200, while the sum is 35.

The square root of 141665543 is about 11902.3335107028. Note that the first 3 decimals coincide. The cubic root of 141665543 is about 521.3004224447.

The spelling of 141665543 in words is "one hundred forty-one million, six hundred sixty-five thousand, five hundred forty-three".