1445620 has 24 divisors (see below), whose sum is σ = 3312288. Its totient is φ = 525600.

The previous prime is 1445599. The next prime is 1445657. The reversal of 1445620 is 265441.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1445591 and 1445600.

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, 3066 + ... + 3505.

It is an arithmetic number, because the mean of its divisors is an integer number (138012).

2^1445620 is an apocalyptic number.

1445620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445620 is an abundant number, since it is smaller than the sum of its proper divisors (1866668).

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

1445620 is a wasteful number, since it uses less digits than its factorization.

1445620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6591 (or 6589 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1445620 is about 1202.3393863631. The cubic root of 1445620 is about 113.0710389450.

The spelling of 1445620 in words is "one million, four hundred forty-five thousand, six hundred twenty".