99801252 has 18 divisors (see below), whose sum is σ = 252275478. Its totient is φ = 33267072.

The previous prime is 99801241. The next prime is 99801259. The reversal of 99801252 is 25210899.

It can be written as a sum of positive squares in only one way, i.e., 94012416 + 5788836 = 9696^2 + 2406^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2772257 = 99801252 / (9 + 9 + 8 + 0 + 1 + 2 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (99801259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1386093 + ... + 1386164.

Almost surely, 2^99801252 is an apocalyptic number.

It is an amenable number.

99801252 is an abundant number, since it is smaller than the sum of its proper divisors (152474226).

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

99801252 is a wasteful number, since it uses less digits than its factorization.

99801252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772267 (or 2772262 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 99801252 is about 9990.0576574913. The cubic root of 99801252 is about 463.8511772521.

The spelling of 99801252 in words is "ninety-nine million, eight hundred one thousand, two hundred fifty-two".