1445520 has 80 divisors (see below), whose sum is σ = 4731840. Its totient is φ = 364032.

The previous prime is 1445519. The next prime is 1445533. The reversal of 1445520 is 255441.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4402 + ... + 4718.

It is an arithmetic number, because the mean of its divisors is an integer number (59148).

2^1445520 is an apocalyptic number.

1445520 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 1445520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365920).

1445520 is an abundant number, since it is smaller than the sum of its proper divisors (3286320).

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

1445520 is a wasteful number, since it uses less digits than its factorization.

1445520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1445520 is about 1202.2978000479. The cubic root of 1445520 is about 113.0684316751.

The spelling of 1445520 in words is "one million, four hundred forty-five thousand, five hundred twenty".