1340245 has 4 divisors (see below), whose sum is σ = 1608300. Its totient is φ = 1072192.

The previous prime is 1340243. The next prime is 1340281. The reversal of 1340245 is 5420431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 1096209 = 494^2 + 1047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340245 - 2¹ = 1340243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134020 + ... + 134029.

It is an arithmetic number, because the mean of its divisors is an integer number (402075).

2^1340245 is an apocalyptic number.

It is an amenable number.

1340245 is a deficient number, since it is larger than the sum of its proper divisors (268055).

1340245 is an equidigital number, since it uses as much as digits as its factorization.

1340245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268054.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1340245 is about 1157.6895093245. The cubic root of 1340245 is about 110.2540957921.

Adding to 1340245 its reverse (5420431), we get a palindrome (6760676).

The spelling of 1340245 in words is "one million, three hundred forty thousand, two hundred forty-five".