1405445 has 16 divisors (see below), whose sum is σ = 1772928. Its totient is φ = 1068480.

The previous prime is 1405421. The next prime is 1405451. The reversal of 1405445 is 5445041.

It is not a de Polignac number, because 1405445 - 2¹² = 1401349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405445.

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, 13082 + ... + 13188.

It is an arithmetic number, because the mean of its divisors is an integer number (110808).

2^1405445 is an apocalyptic number.

It is an amenable number.

1405445 is a deficient number, since it is larger than the sum of its proper divisors (367483).

1405445 is a wasteful number, since it uses less digits than its factorization.

1405445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1405445 is about 1185.5146561726. The cubic root of 1405445 is about 112.0137366230.

The spelling of 1405445 in words is "one million, four hundred five thousand, four hundred forty-five".