145543 has 2 divisors, whose sum is σ = 145544. Its totient is φ = 145542.

The previous prime is 145531. The next prime is 145547. The reversal of 145543 is 345541.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145543 - 2⁵ = 145511 is a prime.

It is the 382-nd Hogben number.

It is equal to p₁₃₄₆₈ and since 145543 and 13468 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145547) by changing a digit.

It is a nontrivial repunit in base 381.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72771 + 72772.

It is an arithmetic number, because the mean of its divisors is an integer number (72772).

2¹⁴⁵⁵⁴³ is an apocalyptic number.

145543 is a deficient number, since it is larger than the sum of its proper divisors (1).

145543 is an equidigital number, since it uses as much as digits as its factorization.

145543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 22.

The square root of 145543 is about 381.5009829607. The cubic root of 145543 is about 52.6013763031.

The spelling of 145543 in words is "one hundred forty-five thousand, five hundred forty-three".