1357729 has 2 divisors, whose sum is σ = 1357730. Its totient is φ = 1357728.

The previous prime is 1357717. The next prime is 1357753. The reversal of 1357729 is 9277531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 30625 = 1152^2 + 175^2 .

It is an emirp because it is prime and its reverse (9277531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1357729 - 2¹¹ = 1355681 is a prime.

1357729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1357694 and 1357703.

It is not a weakly prime, because it can be changed into another prime (1357129) 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, 678864 + 678865.

It is an arithmetic number, because the mean of its divisors is an integer number (678865).

2^1357729 is an apocalyptic number.

It is an amenable number.

1357729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1357729 is an equidigital number, since it uses as much as digits as its factorization.

1357729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 34.

The square root of 1357729 is about 1165.2162889352. The cubic root of 1357729 is about 110.7314613460.

The spelling of 1357729 in words is "one million, three hundred fifty-seven thousand, seven hundred twenty-nine".