10557985 has 4 divisors (see below), whose sum is σ = 12669588. Its totient is φ = 8446384.

The previous prime is 10557983. The next prime is 10558007. The reversal of 10557985 is 58975501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1096209 + 9461776 = 1047^2 + 3076^2 .

It is a cyclic number.

It is not a de Polignac number, because 10557985 - 2¹ = 10557983 is a prime.

It is a super-2 number, since 2×10557985² = 222942094520450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10557983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055794 + ... + 1055803.

It is an arithmetic number, because the mean of its divisors is an integer number (3167397).

Almost surely, 2^10557985 is an apocalyptic number.

It is an amenable number.

10557985 is a deficient number, since it is larger than the sum of its proper divisors (2111603).

10557985 is an equidigital number, since it uses as much as digits as its factorization.

10557985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111602.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 10557985 is about 3249.3053103702. The cubic root of 10557985 is about 219.3783068091.

The spelling of 10557985 in words is "ten million, five hundred fifty-seven thousand, nine hundred eighty-five".