1340653 has 2 divisors, whose sum is σ = 1340654. Its totient is φ = 1340652.

The previous prime is 1340639. The next prime is 1340681. The reversal of 1340653 is 3560431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 79524 = 1123^2 + 282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670326 + 670327.

It is an arithmetic number, because the mean of its divisors is an integer number (670327).

2^1340653 is an apocalyptic number.

It is an amenable number.

1340653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340653 is an equidigital number, since it uses as much as digits as its factorization.

1340653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1340653 is about 1157.8657089663. The cubic root of 1340653 is about 110.2652825794.

The spelling of 1340653 in words is "one million, three hundred forty thousand, six hundred fifty-three".