800012500 has 144 divisors (see below), whose sum is σ = 2057868288. Its totient is φ = 266400000.

The previous prime is 800012491. The next prime is 800012501. The reversal of 800012500 is 5210008.

It is a happy number.

It is a sliding number, since 800012500 = 12500 + 800000000 and 1/12500 + 1/800000000 = 0.0000800012500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800012501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3587389 + ... + 3587611.

It is an arithmetic number, because the mean of its divisors is an integer number (14290752).

Almost surely, 2^800012500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 800012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028934144).

800012500 is an abundant number, since it is smaller than the sum of its proper divisors (1257855788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

800012500 is a wasteful number, since it uses less digits than its factorization.

800012500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 800012500 is about 28284.4922174679. The cubic root of 800012500 is about 928.3226016857.

Adding to 800012500 its reverse (5210008), we get a palindrome (805222508).

It can be divided in two parts, 8000 and 12500, that multiplied together give a 8-th power (100000000 = 10⁸).

The spelling of 800012500 in words is "eight hundred million, twelve thousand, five hundred".