1445445 has 40 divisors (see below), whose sum is σ = 2683296. Its totient is φ = 743904.

The previous prime is 1445443. The next prime is 1445453. The reversal of 1445445 is 5445441.

It is not a de Polignac number, because 1445445 - 2¹ = 1445443 is a prime.

It is a super-2 number, since 2×1445445² = 4178622496050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

1445445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445443) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17374 + ... + 17456.

2^1445445 is an apocalyptic number.

1445445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1445445 is a deficient number, since it is larger than the sum of its proper divisors (1237851).

1445445 is an equidigital number, since it uses as much as digits as its factorization.

1445445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 134 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 1445445 is about 1202.2666093675. The cubic root of 1445445 is about 113.0664761438.

1445445 divided by its sum of digits (27) gives a palindrome (53535).

The spelling of 1445445 in words is "one million, four hundred forty-five thousand, four hundred forty-five".