1042820853 has 4 divisors (see below), whose sum is σ = 1390427808. Its totient is φ = 695213900.

The previous prime is 1042820843. The next prime is 1042820893. The reversal of 1042820853 is 3580282401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1042820853 - 2⁴ = 1042820837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042820843) 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 in 3 ways as a sum of consecutive naturals, for example, 173803473 + ... + 173803478.

It is an arithmetic number, because the mean of its divisors is an integer number (347606952).

Almost surely, 2^1042820853 is an apocalyptic number.

It is an amenable number.

1042820853 is a deficient number, since it is larger than the sum of its proper divisors (347606955).

1042820853 is an equidigital number, since it uses as much as digits as its factorization.

1042820853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347606954.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 1042820853 is about 32292.7368459225. The cubic root of 1042820853 is about 1014.0745941024.

The spelling of 1042820853 in words is "one billion, forty-two million, eight hundred twenty thousand, eight hundred fifty-three".