1557359 has 2 divisors, whose sum is σ = 1557360. Its totient is φ = 1557358.

The previous prime is 1557343. The next prime is 1557371. The reversal of 1557359 is 9537551.

It is a strong prime.

It is an emirp because it is prime and its reverse (9537551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1557359 - 2⁴ = 1557343 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778679 + 778680.

It is an arithmetic number, because the mean of its divisors is an integer number (778680).

2^1557359 is an apocalyptic number.

1557359 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557359 is an equidigital number, since it uses as much as digits as its factorization.

1557359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23625, while the sum is 35.

The square root of 1557359 is about 1247.9419056991. The cubic root of 1557359 is about 115.9123148288.

The spelling of 1557359 in words is "one million, five hundred fifty-seven thousand, three hundred fifty-nine".