1230605 has 4 divisors (see below), whose sum is σ = 1476732. Its totient is φ = 984480.

The previous prime is 1230599. The next prime is 1230629. The reversal of 1230605 is 5060321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5060321 = 7 ⋅722903.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 1075369 = 394^2 + 1037^2 .

It is not a de Polignac number, because 1230605 - 2⁸ = 1230349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123056 + ... + 123065.

It is an arithmetic number, because the mean of its divisors is an integer number (369183).

2^1230605 is an apocalyptic number.

It is an amenable number.

1230605 is a deficient number, since it is larger than the sum of its proper divisors (246127).

1230605 is an equidigital number, since it uses as much as digits as its factorization.

1230605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246126.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1230605 is about 1109.3263721737. The cubic root of 1230605 is about 107.1616910806.

Adding to 1230605 its reverse (5060321), we get a palindrome (6290926).

The spelling of 1230605 in words is "one million, two hundred thirty thousand, six hundred five".