1042685849 has 2 divisors, whose sum is σ = 1042685850. Its totient is φ = 1042685848.

The previous prime is 1042685821. The next prime is 1042685867. The reversal of 1042685849 is 9485862401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 920030224 + 122655625 = 30332^2 + 11075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042685849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1042685869) by changing a digit.

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 as a sum of consecutive naturals, namely, 521342924 + 521342925.

It is an arithmetic number, because the mean of its divisors is an integer number (521342925).

Almost surely, 2^1042685849 is an apocalyptic number.

It is an amenable number.

1042685849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042685849 is an equidigital number, since it uses as much as digits as its factorization.

1042685849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 1042685849 is about 32290.6464630239. The cubic root of 1042685849 is about 1014.0308313812.

The spelling of 1042685849 in words is "one billion, forty-two million, six hundred eighty-five thousand, eight hundred forty-nine".