1148405 has 4 divisors (see below), whose sum is σ = 1378092. Its totient is φ = 918720.

The previous prime is 1148387. The next prime is 1148437. The reversal of 1148405 is 5048411.

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 662596 + 485809 = 814^2 + 697^2 .

It is not a de Polignac number, because 1148405 - 2²⁰ = 99829 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114836 + ... + 114845.

It is an arithmetic number, because the mean of its divisors is an integer number (344523).

2^1148405 is an apocalyptic number.

It is an amenable number.

1148405 is a deficient number, since it is larger than the sum of its proper divisors (229687).

1148405 is an equidigital number, since it uses as much as digits as its factorization.

1148405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229686.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1148405 is about 1071.6365988524. The cubic root of 1148405 is about 104.7204962448.

The spelling of 1148405 in words is "one million, one hundred forty-eight thousand, four hundred five".