1557103 has 2 divisors, whose sum is σ = 1557104. Its totient is φ = 1557102.

The previous prime is 1557091. The next prime is 1557109. The reversal of 1557103 is 3017551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1557103 - 2⁹ = 1556591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1557109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778551 + 778552.

It is an arithmetic number, because the mean of its divisors is an integer number (778552).

2^1557103 is an apocalyptic number.

1557103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557103 is an equidigital number, since it uses as much as digits as its factorization.

1557103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 1557103 is about 1247.8393326066. The cubic root of 1557103 is about 115.9059632258.

The spelling of 1557103 in words is "one million, five hundred fifty-seven thousand, one hundred three".