1020050001 has 12 divisors (see below), whose sum is σ = 1479732228. Its totient is φ = 677113344.

The previous prime is 1020049993. The next prime is 1020050033. The reversal of 1020050001 is 1000500201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 620010000 + 400040001 = 24900^2 + 20001^2 .

It is not a de Polignac number, because 1020050001 - 2³ = 1020049993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1020050041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241120 + ... + 245313.

It is an arithmetic number, because the mean of its divisors is an integer number (123311019).

Almost surely, 2^1020050001 is an apocalyptic number.

It is an amenable number.

1020050001 is a deficient number, since it is larger than the sum of its proper divisors (459682227).

1020050001 is a wasteful number, since it uses less digits than its factorization.

1020050001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486672 (or 486669 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1020050001 is about 31938.2216317690. The cubic root of 1020050001 is about 1006.6391577038.

Adding to 1020050001 its reverse (1000500201), we get a palindrome (2020550202).

The spelling of 1020050001 in words is "one billion, twenty million, fifty thousand, one".