1330605 has 12 divisors (see below), whose sum is σ = 2306460. Its totient is φ = 709632.

The previous prime is 1330603. The next prime is 1330621. The reversal of 1330605 is 5060331.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 736164 = 771^2 + 858^2 .

It is not a de Polignac number, because 1330605 - 2¹ = 1330603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330601) 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 11 ways as a sum of consecutive naturals, for example, 14740 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (192205).

2^1330605 is an apocalyptic number.

1330605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1330605 is a deficient number, since it is larger than the sum of its proper divisors (975855).

1330605 is a wasteful number, since it uses less digits than its factorization.

1330605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29580 (or 29577 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 1330605 is about 1153.5185304103. The cubic root of 1330605 is about 109.9891173807.

Adding to 1330605 its reverse (5060331), we get a palindrome (6390936).

The spelling of 1330605 in words is "one million, three hundred thirty thousand, six hundred five".