145845 has 24 divisors (see below), whose sum is σ = 289536. Its totient is φ = 66528.

The previous prime is 145829. The next prime is 145861. The reversal of 145845 is 548541.

It is an interprime number because it is at equal distance from previous prime (145829) and next prime (145861).

It is not a de Polignac number, because 145845 - 2⁴ = 145829 is a prime.

It is a Curzon number.

145845 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84 + ... + 546.

It is an arithmetic number, because the mean of its divisors is an integer number (12064).

2¹⁴⁵⁸⁴⁵ is an apocalyptic number.

145845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145845 is a deficient number, since it is larger than the sum of its proper divisors (143691).

145845 is a wasteful number, since it uses less digits than its factorization.

145845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 478 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 145845 is about 381.8965828598. The cubic root of 145845 is about 52.6377335785.

It can be divided in two parts, 145 and 845, that added together give a triangular number (990 = T₄₄).

The spelling of 145845 in words is "one hundred forty-five thousand, eight hundred forty-five".