145811 has 4 divisors (see below), whose sum is σ = 147000. Its totient is φ = 144624.

The previous prime is 145807. The next prime is 145819. The reversal of 145811 is 118541.

145811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145811 - 2² = 145807 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145819) 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, 386 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (36750).

2¹⁴⁵⁸¹¹ is an apocalyptic number.

145811 is a deficient number, since it is larger than the sum of its proper divisors (1189).

145811 is a wasteful number, since it uses less digits than its factorization.

145811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 160, while the sum is 20.

The square root of 145811 is about 381.8520655961. The cubic root of 145811 is about 52.6336428840.

The spelling of 145811 in words is "one hundred forty-five thousand, eight hundred eleven".