1245073 has 4 divisors (see below), whose sum is σ = 1250740.
Its totient is φ = 1239408.
The previous prime is 1245067. The next prime is 1245091. The reversal of 1245073 is 3705421.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 966289 + 278784 = 983^2 + 528^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1245073 is a prime.
It is a Duffinian number.
1245073 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (1245973) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2490 + ... + 2947.
It is an arithmetic number, because the mean of its divisors is an integer number (312685).
21245073 is an apocalyptic number.
It is an amenable number.
1245073 is a deficient number, since it is larger than the sum of its proper divisors (5667).
1245073 is an equidigital number, since it uses as much as digits as its factorization.
1245073 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5666.
The product of its (nonzero) digits is 840, while the sum is 22.
The square root of 1245073 is about 1115.8283918238.
The cubic root of 1245073 is about 107.5800161429.
The spelling of 1245073 in words is "one million, two hundred forty-five thousand, seventy-three".