1057885405 has 4 divisors (see below), whose sum is σ = 1269462492. Its totient is φ = 846308320.

The previous prime is 1057885379. The next prime is 1057885427. The reversal of 1057885405 is 5045887501.

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 392554969 + 665330436 = 19813^2 + 25794^2 .

It is not a de Polignac number, because 1057885405 - 2⁷ = 1057885277 is a prime.

It is a super-2 number, since 2×1057885405² = 2238243060224028050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105788536 + ... + 105788545.

It is an arithmetic number, because the mean of its divisors is an integer number (317365623).

Almost surely, 2^1057885405 is an apocalyptic number.

It is an amenable number.

1057885405 is a deficient number, since it is larger than the sum of its proper divisors (211577087).

1057885405 is an equidigital number, since it uses as much as digits as its factorization.

1057885405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211577086.

The product of its (nonzero) digits is 224000, while the sum is 43.

The square root of 1057885405 is about 32525.1503455403. The cubic root of 1057885405 is about 1018.9343622079.

The spelling of 1057885405 in words is "one billion, fifty-seven million, eight hundred eighty-five thousand, four hundred five".