148678405 has 4 divisors (see below), whose sum is σ = 178414092. Its totient is φ = 118942720.

The previous prime is 148678403. The next prime is 148678421. The reversal of 148678405 is 504876841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98069409 + 50608996 = 9903^2 + 7114^2 .

It is not a de Polignac number, because 148678405 - 2¹ = 148678403 is a prime.

It is a super-2 number, since 2×148678405² = 44210536226688050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148678403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14867836 + ... + 14867845.

It is an arithmetic number, because the mean of its divisors is an integer number (44603523).

Almost surely, 2^148678405 is an apocalyptic number.

It is an amenable number.

148678405 is a deficient number, since it is larger than the sum of its proper divisors (29735687).

148678405 is an equidigital number, since it uses as much as digits as its factorization.

148678405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29735686.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 148678405 is about 12193.3754555496. The cubic root of 148678405 is about 529.7642300095.

The spelling of 148678405 in words is "one hundred forty-eight million, six hundred seventy-eight thousand, four hundred five".