1021057845 has 16 divisors (see below), whose sum is σ = 1668453120. Its totient is φ = 532977344.

The previous prime is 1021057799. The next prime is 1021057871. The reversal of 1021057845 is 5487501201.

It is a cyclic number.

It is not a de Polignac number, because 1021057845 - 2¹⁰ = 1021056821 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 723450 + ... + 724859.

It is an arithmetic number, because the mean of its divisors is an integer number (104278320).

Almost surely, 2^1021057845 is an apocalyptic number.

1021057845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021057845 is a deficient number, since it is larger than the sum of its proper divisors (647395275).

1021057845 is a wasteful number, since it uses less digits than its factorization.

1021057845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448364.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 1021057845 is about 31953.9957595290. The cubic root of 1021057845 is about 1006.9705797863.

The spelling of 1021057845 in words is "one billion, twenty-one million, fifty-seven thousand, eight hundred forty-five".