1340445 has 8 divisors (see below), whose sum is σ = 2144736. Its totient is φ = 714896.

The previous prime is 1340441. The next prime is 1340447. The reversal of 1340445 is 5440431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1340445 - 2² = 1340441 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44667 + ... + 44696.

It is an arithmetic number, because the mean of its divisors is an integer number (268092).

2^1340445 is an apocalyptic number.

1340445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1340445 is a deficient number, since it is larger than the sum of its proper divisors (804291).

1340445 is an equidigital number, since it uses as much as digits as its factorization.

1340445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89371.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1340445 is about 1157.7758850486. The cubic root of 1340445 is about 110.2595797950.

Adding to 1340445 its reverse (5440431), we get a palindrome (6780876).

The spelling of 1340445 in words is "one million, three hundred forty thousand, four hundred forty-five".