1230645 has 16 divisors (see below), whose sum is σ = 2120832. Its totient is φ = 605760.

The previous prime is 1230637. The next prime is 1230667. The reversal of 1230645 is 5460321.

It is a happy number.

It is not a de Polignac number, because 1230645 - 2³ = 1230637 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2961 + ... + 3350.

It is an arithmetic number, because the mean of its divisors is an integer number (132552).

2^1230645 is an apocalyptic number.

1230645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1230645 is a deficient number, since it is larger than the sum of its proper divisors (890187).

1230645 is a wasteful number, since it uses less digits than its factorization.

1230645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6332.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1230645 is about 1109.3444009865. The cubic root of 1230645 is about 107.1628521413.

Adding to 1230645 its reverse (5460321), we get a palindrome (6690966).

The spelling of 1230645 in words is "one million, two hundred thirty thousand, six hundred forty-five".