1445320 has 32 divisors (see below), whose sum is σ = 3395520. Its totient is φ = 552640.

The previous prime is 1445317. The next prime is 1445329. The reversal of 1445320 is 235441.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (106110).

2^1445320 is an apocalyptic number.

1445320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1445320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697760).

1445320 is an abundant number, since it is smaller than the sum of its proper divisors (1950200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445320 is a wasteful number, since it uses less digits than its factorization.

1445320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1445320 is about 1202.2146231019. The cubic root of 1445320 is about 113.0632167745.

It can be divided in two parts, 1445 and 320, that multiplied together give a square (462400 = 680²).

The spelling of 1445320 in words is "one million, four hundred forty-five thousand, three hundred twenty".