1042867685 has 4 divisors (see below), whose sum is σ = 1251441228. Its totient is φ = 834294144.

The previous prime is 1042867627. The next prime is 1042867717. The reversal of 1042867685 is 5867682401.

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 395572321 + 647295364 = 19889^2 + 25442^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042867685 - 2⁸ = 1042867429 is a prime.

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, 104286764 + ... + 104286773.

It is an arithmetic number, because the mean of its divisors is an integer number (312860307).

Almost surely, 2^1042867685 is an apocalyptic number.

It is an amenable number.

1042867685 is a deficient number, since it is larger than the sum of its proper divisors (208573543).

1042867685 is an equidigital number, since it uses as much as digits as its factorization.

1042867685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208573542.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 1042867685 is about 32293.4619543957. The cubic root of 1042867685 is about 1014.0897742203.

The spelling of 1042867685 in words is "one billion, forty-two million, eight hundred sixty-seven thousand, six hundred eighty-five".