1308005 has 4 divisors (see below), whose sum is σ = 1569612. Its totient is φ = 1046400.

The previous prime is 1307993. The next prime is 1308011. The reversal of 1308005 is 5008031.

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 228484 + 1079521 = 478^2 + 1039^2 .

It is not a de Polignac number, because 1308005 - 2²⁰ = 259429 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130796 + ... + 130805.

It is an arithmetic number, because the mean of its divisors is an integer number (392403).

2^1308005 is an apocalyptic number.

It is an amenable number.

1308005 is a deficient number, since it is larger than the sum of its proper divisors (261607).

1308005 is an equidigital number, since it uses as much as digits as its factorization.

1308005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261606.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1308005 is about 1143.6804623670. The cubic root of 1308005 is about 109.3628454521.

The spelling of 1308005 in words is "one million, three hundred eight thousand, five".