1020001004 has 24 divisors (see below), whose sum is σ = 1952391168. Its totient is φ = 462418640.

The previous prime is 1020001001. The next prime is 1020001013. The reversal of 1020001004 is 4001000201.

It is a super-2 number, since 2×1020001004² = 2080804096322016032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020000982 and 1020001000.

It is not an unprimeable number, because it can be changed into a prime (1020001001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13412 + ... + 47115.

It is an arithmetic number, because the mean of its divisors is an integer number (81349632).

Almost surely, 2^1020001004 is an apocalyptic number.

It is an amenable number.

1020001004 is a deficient number, since it is larger than the sum of its proper divisors (932390164).

1020001004 is a wasteful number, since it uses less digits than its factorization.

1020001004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60925 (or 60923 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1020001004 is about 31937.4545635685. The cubic root of 1020001004 is about 1006.6230398375.

Adding to 1020001004 its reverse (4001000201), we get a palindrome (5021001205).

The spelling of 1020001004 in words is "one billion, twenty million, one thousand, four".