999998025 has 96 divisors (see below), whose sum is σ = 1956541440. Its totient is φ = 445927680.

The previous prime is 999998023. The next prime is 999998059. The reversal of 999998025 is 520899999.

999998025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 999998025 - 2¹ = 999998023 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 999998025.

It is not an unprimeable number, because it can be changed into a prime (999998023) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 424902 + ... + 427248.

It is an arithmetic number, because the mean of its divisors is an integer number (20380640).

Almost surely, 2^999998025 is an apocalyptic number.

999998025 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

999998025 is a deficient number, since it is larger than the sum of its proper divisors (956543415).

999998025 is a wasteful number, since it uses less digits than its factorization.

999998025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 60.

The square root of 999998025 is about 31622.7453741765. The cubic root of 999998025 is about 999.9993416662. Note that the first 3 decimals are identical.

The spelling of 999998025 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, twenty-five".