10557409 has 2 divisors, whose sum is σ = 10557410. Its totient is φ = 10557408.

The previous prime is 10557373. The next prime is 10557431. The reversal of 10557409 is 90475501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10543009 + 14400 = 3247^2 + 120^2 .

It is an emirp because it is prime and its reverse (90475501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10557409 - 2²³ = 2168801 is a prime.

It is a super-2 number, since 2×10557409² = 222917769586562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10557439) 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, 5278704 + 5278705.

It is an arithmetic number, because the mean of its divisors is an integer number (5278705).

Almost surely, 2^10557409 is an apocalyptic number.

It is an amenable number.

10557409 is a deficient number, since it is larger than the sum of its proper divisors (1).

10557409 is an equidigital number, since it uses as much as digits as its factorization.

10557409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 10557409 is about 3249.2166748310. The cubic root of 10557409 is about 219.3743172788.

It can be divided in two parts, 1055 and 7409, that added together give a square (8464 = 92²).

The spelling of 10557409 in words is "ten million, five hundred fifty-seven thousand, four hundred nine".