1020057817 has 8 divisors (see below), whose sum is σ = 1080435456. Its totient is φ = 959721792.

The previous prime is 1020057809. The next prime is 1020057853. The reversal of 1020057817 is 7187500201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020057817 - 2³ = 1020057809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020057217) 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 7 ways as a sum of consecutive naturals, for example, 50208 + ... + 67534.

It is an arithmetic number, because the mean of its divisors is an integer number (135054432).

Almost surely, 2^1020057817 is an apocalyptic number.

1020057817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1020057817 is a deficient number, since it is larger than the sum of its proper divisors (60377639).

1020057817 is a wasteful number, since it uses less digits than its factorization.

1020057817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 1020057817 is about 31938.3439927621. The cubic root of 1020057817 is about 1006.6417287776.

The spelling of 1020057817 in words is "one billion, twenty million, fifty-seven thousand, eight hundred seventeen".