148240805 has 4 divisors (see below), whose sum is σ = 177888972. Its totient is φ = 118592640.

The previous prime is 148240747. The next prime is 148240817. The reversal of 148240805 is 508042841.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508042841 = 17 ⋅29884873.

It can be written as a sum of positive squares in 2 ways, for example, as 116273089 + 31967716 = 10783^2 + 5654^2 .

It is not a de Polignac number, because 148240805 - 2⁸ = 148240549 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 14824076 + ... + 14824085.

It is an arithmetic number, because the mean of its divisors is an integer number (44472243).

Almost surely, 2^148240805 is an apocalyptic number.

It is an amenable number.

148240805 is a deficient number, since it is larger than the sum of its proper divisors (29648167).

148240805 is an equidigital number, since it uses as much as digits as its factorization.

148240805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29648166.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 148240805 is about 12175.4180626375. The cubic root of 148240805 is about 529.2439736877.

The spelling of 148240805 in words is "one hundred forty-eight million, two hundred forty thousand, eight hundred five".