1002010025 has 6 divisors (see below), whose sum is σ = 1242492462. Its totient is φ = 801608000.

The previous prime is 1002010021. The next prime is 1002010033. The reversal of 1002010025 is 5200102001.

It can be written as a sum of positive squares in 3 ways, for example, as 14227984 + 987782041 = 3772^2 + 31429^2 .

It is not a de Polignac number, because 1002010025 - 2² = 1002010021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002009988 and 1002010015.

It is not an unprimeable number, because it can be changed into a prime (1002010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20040176 + ... + 20040225.

It is an arithmetic number, because the mean of its divisors is an integer number (207082077).

Almost surely, 2^1002010025 is an apocalyptic number.

It is an amenable number.

1002010025 is a deficient number, since it is larger than the sum of its proper divisors (240482437).

1002010025 is an equidigital number, since it uses as much as digits as its factorization.

1002010025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40080411 (or 40080406 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1002010025 is about 31654.5419331887. The cubic root of 1002010025 is about 1000.6695599228.

Adding to 1002010025 its reverse (5200102001), we get a palindrome (6202112026).

The spelling of 1002010025 in words is "one billion, two million, ten thousand, twenty-five".