1345005 has 36 divisors (see below), whose sum is σ = 2479932. Its totient is φ = 699840.

The previous prime is 1344979. The next prime is 1345009. The reversal of 1345005 is 5005431.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 1108809 = 486^2 + 1053^2 .

It is not a de Polignac number, because 1345005 - 2¹⁵ = 1312237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345009) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 32785 + ... + 32825.

It is an arithmetic number, because the mean of its divisors is an integer number (68887).

2^1345005 is an apocalyptic number.

1345005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1345005 is a deficient number, since it is larger than the sum of its proper divisors (1134927).

1345005 is an frugal number, since it uses more digits than its factorization.

1345005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1345005 is about 1159.7435061254. The cubic root of 1345005 is about 110.3844673327.

The spelling of 1345005 in words is "one million, three hundred forty-five thousand, five".