1340505 has 12 divisors (see below), whose sum is σ = 2323620. Its totient is φ = 714912.

The previous prime is 1340497. The next prime is 1340527. The reversal of 1340505 is 5050431.

It can be written as a sum of positive squares in 2 ways, for example, as 219024 + 1121481 = 468^2 + 1059^2 .

It is not a de Polignac number, because 1340505 - 2³ = 1340497 is a prime.

1340505 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14850 + ... + 14939.

It is an arithmetic number, because the mean of its divisors is an integer number (193635).

2^1340505 is an apocalyptic number.

1340505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340505 is a deficient number, since it is larger than the sum of its proper divisors (983115).

1340505 is a wasteful number, since it uses less digits than its factorization.

1340505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29800 (or 29797 counting only the distinct ones).

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

The square root of 1340505 is about 1157.8017965092. The cubic root of 1340505 is about 110.2612248895.

Adding to 1340505 its reverse (5050431), we get a palindrome (6390936).

The spelling of 1340505 in words is "one million, three hundred forty thousand, five hundred five".