147845 has 4 divisors (see below), whose sum is σ = 177420. Its totient is φ = 118272.

The previous prime is 147827. The next prime is 147853. The reversal of 147845 is 548741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548741 = 73 ⋅7517.

It can be written as a sum of positive squares in 2 ways, for example, as 66049 + 81796 = 257^2 + 286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147845 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14780 + ... + 14789.

It is an arithmetic number, because the mean of its divisors is an integer number (44355).

2¹⁴⁷⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

147845 is a deficient number, since it is larger than the sum of its proper divisors (29575).

147845 is an equidigital number, since it uses as much as digits as its factorization.

147845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29574.

The product of its digits is 4480, while the sum is 29.

The square root of 147845 is about 384.5061768034. The cubic root of 147845 is about 52.8772524269.

It can be divided in two parts, 14784 and 5, that multiplied together give a triangular number (73920 = T₃₈₄).

The spelling of 147845 in words is "one hundred forty-seven thousand, eight hundred forty-five".