1245557 has 2 divisors, whose sum is σ = 1245558. Its totient is φ = 1245556.

The previous prime is 1245551. The next prime is 1245589. The reversal of 1245557 is 7555421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234321 + 11236 = 1111^2 + 106^2 .

It is an emirp because it is prime and its reverse (7555421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245557 - 2¹⁰ = 1244533 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622778 + 622779.

It is an arithmetic number, because the mean of its divisors is an integer number (622779).

2^1245557 is an apocalyptic number.

It is an amenable number.

1245557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245557 is an equidigital number, since it uses as much as digits as its factorization.

1245557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 29.

The square root of 1245557 is about 1116.0452499787. The cubic root of 1245557 is about 107.5939542768.

The spelling of 1245557 in words is "one million, two hundred forty-five thousand, five hundred fifty-seven".