1020500401 has 16 divisors (see below), whose sum is σ = 1075179600. Its totient is φ = 967292928.

The previous prime is 1020500389. The next prime is 1020500407. The reversal of 1020500401 is 1040050201.

It can be written as a sum of positive squares in 8 ways, for example, as 15610401 + 1004890000 = 3951^2 + 31700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020500401 - 2⁹ = 1020499889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020500407) 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 15 ways as a sum of consecutive naturals, for example, 355765 + ... + 358621.

It is an arithmetic number, because the mean of its divisors is an integer number (67198725).

Almost surely, 2^1020500401 is an apocalyptic number.

It is an amenable number.

1020500401 is a deficient number, since it is larger than the sum of its proper divisors (54679199).

1020500401 is a wasteful number, since it uses less digits than its factorization.

1020500401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1020500401 is about 31945.2719662863. The cubic root of 1020500401 is about 1006.7872953969.

Adding to 1020500401 its reverse (1040050201), we get a palindrome (2060550602).

The spelling of 1020500401 in words is "one billion, twenty million, five hundred thousand, four hundred one".