1209045 has 8 divisors (see below), whose sum is σ = 1934496. Its totient is φ = 644816.

The previous prime is 1209029. The next prime is 1209053. The reversal of 1209045 is 5409021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1209045 - 2⁴ = 1209029 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 7 ways as a sum of consecutive naturals, for example, 40287 + ... + 40316.

It is an arithmetic number, because the mean of its divisors is an integer number (241812).

2^1209045 is an apocalyptic number.

1209045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1209045 is a deficient number, since it is larger than the sum of its proper divisors (725451).

1209045 is an equidigital number, since it uses as much as digits as its factorization.

1209045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80611.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1209045 is about 1099.5658234049. The cubic root of 1209045 is about 106.5321818590.

The spelling of 1209045 in words is "one million, two hundred nine thousand, forty-five".