1355657 has 2 divisors, whose sum is σ = 1355658. Its totient is φ = 1355656.

The previous prime is 1355647. The next prime is 1355659. The reversal of 1355657 is 7565531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 19321 = 1156^2 + 139^2 .

It is an emirp because it is prime and its reverse (7565531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1355657 - 2⁸ = 1355401 is a prime.

Together with 1355659, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355659) 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, 677828 + 677829.

It is an arithmetic number, because the mean of its divisors is an integer number (677829).

2^1355657 is an apocalyptic number.

It is an amenable number.

1355657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355657 is an equidigital number, since it uses as much as digits as its factorization.

1355657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15750, while the sum is 32.

The square root of 1355657 is about 1164.3268441464. The cubic root of 1355657 is about 110.6751043953.

The spelling of 1355657 in words is "one million, three hundred fifty-five thousand, six hundred fifty-seven".