1000000025 has 12 divisors (see below), whose sum is σ = 1263397932. Its totient is φ = 784904640.

The previous prime is 1000000021. The next prime is 1000000033. The reversal of 1000000025 is 5200000001.

It can be written as a sum of positive squares in 6 ways, for example, as 79423744 + 920576281 = 8912^2 + 30341^2 .

It is not a de Polignac number, because 1000000025 - 2² = 1000000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999999949 and 1000000021.

It is not an unprimeable number, because it can be changed into a prime (1000000021) 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, 376034 + ... + 378683.

It is an arithmetic number, because the mean of its divisors is an integer number (105283161).

Almost surely, 2^1000000025 is an apocalyptic number.

It is an amenable number.

1000000025 is a deficient number, since it is larger than the sum of its proper divisors (263397907).

1000000025 is an equidigital number, since it uses as much as digits as its factorization.

1000000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754780 (or 754775 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 1000000025 is about 31622.7769969685. The cubic root of 1000000025 is about 1000.0000083333. Note that the first 5 decimals are identical.

Adding to 1000000025 its reverse (5200000001), we get a palindrome (6200000026).

The spelling of 1000000025 in words is "one billion, twenty-five", and thus it is an aban number and an uban number.