10505557 has 4 divisors (see below), whose sum is σ = 10516140. Its totient is φ = 10494976.

The previous prime is 10505531. The next prime is 10505563. The reversal of 10505557 is 75550501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5058001 + 5447556 = 2249^2 + 2334^2 .

It is a cyclic number.

It is not a de Polignac number, because 10505557 - 2¹¹ = 10503509 is a prime.

It is a super-2 number, since 2×10505557² = 220733455760498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10505527) 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, 3628 + ... + 5845.

It is an arithmetic number, because the mean of its divisors is an integer number (2629035).

Almost surely, 2^10505557 is an apocalyptic number.

It is an amenable number.

10505557 is a deficient number, since it is larger than the sum of its proper divisors (10583).

10505557 is an equidigital number, since it uses as much as digits as its factorization.

10505557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10582.

The product of its (nonzero) digits is 4375, while the sum is 28.

The square root of 10505557 is about 3241.2276994991. The cubic root of 10505557 is about 219.0145803210.

The spelling of 10505557 in words is "ten million, five hundred five thousand, five hundred fifty-seven".