1445420 has 12 divisors (see below), whose sum is σ = 3035424. Its totient is φ = 578160.

The previous prime is 1445419. The next prime is 1445429. The reversal of 1445420 is 245441.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 72271 = 1445420 / (1 + 4 + 4 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1445392 and 1445401.

It is not an unprimeable number, because it can be changed into a prime (1445429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36116 + ... + 36155.

It is an arithmetic number, because the mean of its divisors is an integer number (252952).

2^1445420 is an apocalyptic number.

1445420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445420 is an abundant number, since it is smaller than the sum of its proper divisors (1590004).

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

1445420 is a wasteful number, since it uses less digits than its factorization.

1445420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72280 (or 72278 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1445420 is about 1202.2562122942. The cubic root of 1445420 is about 113.0658242849.

The spelling of 1445420 in words is "one million, four hundred forty-five thousand, four hundred twenty".