1340453 has 4 divisors (see below), whose sum is σ = 1346688. Its totient is φ = 1334220.

The previous prime is 1340447. The next prime is 1340459. The reversal of 1340453 is 3540431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3540431 = 1789 ⋅1979.

It is an interprime number because it is at equal distance from previous prime (1340447) and next prime (1340459).

It is a cyclic number.

It is not a de Polignac number, because 1340453 - 2¹⁴ = 1324069 is a prime.

It is a Duffinian 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 (1340459) 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, 2783 + ... + 3228.

It is an arithmetic number, because the mean of its divisors is an integer number (336672).

2^1340453 is an apocalyptic number.

It is an amenable number.

1340453 is a deficient number, since it is larger than the sum of its proper divisors (6235).

1340453 is an equidigital number, since it uses as much as digits as its factorization.

1340453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6234.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1340453 is about 1157.7793399435. The cubic root of 1340453 is about 110.2597991438.

Adding to 1340453 its reverse (3540431), we get a palindrome (4880884).

The spelling of 1340453 in words is "one million, three hundred forty thousand, four hundred fifty-three".