1557113 has 2 divisors, whose sum is σ = 1557114. Its totient is φ = 1557112.

The previous prime is 1557109. The next prime is 1557119. The reversal of 1557113 is 3117551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984064 + 573049 = 992^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557113 - 2² = 1557109 is a prime.

It is not a weakly prime, because it can be changed into another prime (1557119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778556 + 778557.

It is an arithmetic number, because the mean of its divisors is an integer number (778557).

2^1557113 is an apocalyptic number.

It is an amenable number.

1557113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557113 is an equidigital number, since it uses as much as digits as its factorization.

1557113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 525, while the sum is 23.

The square root of 1557113 is about 1247.8433395262. The cubic root of 1557113 is about 115.9062113483.

The spelling of 1557113 in words is "one million, five hundred fifty-seven thousand, one hundred thirteen".