147705 has 16 divisors (see below), whose sum is σ = 242880. Its totient is φ = 76608.

The previous prime is 147703. The next prime is 147709. The reversal of 147705 is 507741.

147705 = 117² + 118² + ... + 126².

It is not a de Polignac number, because 147705 - 2¹ = 147703 is a prime.

It is a Curzon number.

147705 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147705.

It is not an unprimeable number, because it can be changed into a prime (147703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (15180).

2¹⁴⁷⁷⁰⁵ is an apocalyptic number.

147705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

147705 is a deficient number, since it is larger than the sum of its proper divisors (95175).

147705 is a wasteful number, since it uses less digits than its factorization.

147705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 147705 is about 384.3240819933. The cubic root of 147705 is about 52.8605566684.

The spelling of 147705 in words is "one hundred forty-seven thousand, seven hundred five".