145643 has 2 divisors, whose sum is σ = 145644. Its totient is φ = 145642.

The previous prime is 145637. The next prime is 145661. The reversal of 145643 is 346541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145643 - 2¹⁶ = 80107 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (145603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72821 + 72822.

It is an arithmetic number, because the mean of its divisors is an integer number (72822).

2¹⁴⁵⁶⁴³ is an apocalyptic number.

145643 is a deficient number, since it is larger than the sum of its proper divisors (1).

145643 is an equidigital number, since it uses as much as digits as its factorization.

145643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 145643 is about 381.6320217173. The cubic root of 145643 is about 52.6134207009.

The spelling of 145643 in words is "one hundred forty-five thousand, six hundred forty-three".