1393445 has 4 divisors (see below), whose sum is σ = 1672140. Its totient is φ = 1114752.

The previous prime is 1393417. The next prime is 1393451. The reversal of 1393445 is 5443931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5443931 = 97 ⋅56123.

It can be written as a sum of positive squares in 2 ways, for example, as 231361 + 1162084 = 481^2 + 1078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139340 + ... + 139349.

It is an arithmetic number, because the mean of its divisors is an integer number (418035).

2^1393445 is an apocalyptic number.

It is an amenable number.

1393445 is a deficient number, since it is larger than the sum of its proper divisors (278695).

1393445 is an equidigital number, since it uses as much as digits as its factorization.

1393445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278694.

The product of its digits is 6480, while the sum is 29.

The square root of 1393445 is about 1180.4427135613. The cubic root of 1393445 is about 111.6940256223.

The spelling of 1393445 in words is "one million, three hundred ninety-three thousand, four hundred forty-five".