148705 has 4 divisors (see below), whose sum is σ = 178452. Its totient is φ = 118960.

The previous prime is 148693. The next prime is 148711. The reversal of 148705 is 507841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507841 = 17 ⋅29873.

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 51984 = 311^2 + 228^2 .

It is not a de Polignac number, because 148705 - 2⁹ = 148193 is a prime.

It is a super-2 number, since 2×148705² = 44226354050, which contains 22 as substring.

It is a Duffinian number.

148705 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 148705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14866 + ... + 14875.

It is an arithmetic number, because the mean of its divisors is an integer number (44613).

2¹⁴⁸⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

148705 is a deficient number, since it is larger than the sum of its proper divisors (29747).

148705 is an equidigital number, since it uses as much as digits as its factorization.

148705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29746.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 148705 is about 385.6228727656. The cubic root of 148705 is about 52.9795815497.

The spelling of 148705 in words is "one hundred forty-eight thousand, seven hundred five".