1356629 has 2 divisors, whose sum is σ = 1356630. Its totient is φ = 1356628.

The previous prime is 1356623. The next prime is 1356643. The reversal of 1356629 is 9266531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828100 + 528529 = 910^2 + 727^2 .

It is an emirp because it is prime and its reverse (9266531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1356629 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1356595 and 1356604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356623) 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 as a sum of consecutive naturals, namely, 678314 + 678315.

It is an arithmetic number, because the mean of its divisors is an integer number (678315).

2^1356629 is an apocalyptic number.

It is an amenable number.

1356629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356629 is an equidigital number, since it uses as much as digits as its factorization.

1356629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 32.

The square root of 1356629 is about 1164.7441779206. The cubic root of 1356629 is about 110.7015492608.

The spelling of 1356629 in words is "one million, three hundred fifty-six thousand, six hundred twenty-nine".