1020023001 has 24 divisors (see below), whose sum is σ = 1589482440. Its totient is φ = 627933696.

The previous prime is 1020022987. The next prime is 1020023027. The reversal of 1020023001 is 1003200201.

It is a happy number.

1020023001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 359481600 + 660541401 = 18960^2 + 25701^2 .

It is not a de Polignac number, because 1020023001 - 2⁷ = 1020022873 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1020023041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54786 + ... + 71003.

It is an arithmetic number, because the mean of its divisors is an integer number (66228435).

Almost surely, 2^1020023001 is an apocalyptic number.

It is an amenable number.

1020023001 is a deficient number, since it is larger than the sum of its proper divisors (569459439).

1020023001 is a wasteful number, since it uses less digits than its factorization.

1020023001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125865 (or 125862 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1020023001 is about 31937.7989379356. The cubic root of 1020023001 is about 1006.6302759506.

Adding to 1020023001 its reverse (1003200201), we get a palindrome (2023223202).

The spelling of 1020023001 in words is "one billion, twenty million, twenty-three thousand, one".