147645 has 24 divisors (see below), whose sum is σ = 272376. Its totient is φ = 73728.

The previous prime is 147629. The next prime is 147647. The reversal of 147645 is 546741.

147645 is a `hidden beast` number, since 14 + 7 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15876 + 131769 = 126^2 + 363^2 .

It is not a de Polignac number, because 147645 - 2⁴ = 147629 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147645.

It is not an unprimeable number, because it can be changed into a prime (147647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 669 + ... + 861.

It is an arithmetic number, because the mean of its divisors is an integer number (11349).

2¹⁴⁷⁶⁴⁵ is an apocalyptic number.

147645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

147645 is a deficient number, since it is larger than the sum of its proper divisors (124731).

147645 is a wasteful number, since it uses less digits than its factorization.

147645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 218 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 147645 is about 384.2460149436. The cubic root of 147645 is about 52.8533981138.

It can be divided in two parts, 1476 and 45, that added together give a square (1521 = 39²).

The spelling of 147645 in words is "one hundred forty-seven thousand, six hundred forty-five".