1020557001 has 8 divisors (see below), whose sum is σ = 1362066624. Its totient is φ = 679709360.

The previous prime is 1020556987. The next prime is 1020557011. The reversal of 1020557001 is 1007550201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020557001 is a prime.

It is a super-2 number, since 2×1020557001² = 2083073184580228002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020557011) 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, 161886 + ... + 168071.

It is an arithmetic number, because the mean of its divisors is an integer number (170258328).

Almost surely, 2^1020557001 is an apocalyptic number.

It is an amenable number.

1020557001 is a deficient number, since it is larger than the sum of its proper divisors (341509623).

1020557001 is a wasteful number, since it uses less digits than its factorization.

1020557001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330991.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 1020557001 is about 31946.1578440976. The cubic root of 1020557001 is about 1006.8059081962.

The spelling of 1020557001 in words is "one billion, twenty million, five hundred fifty-seven thousand, one".