9945252 has 18 divisors (see below), whose sum is σ = 25139478. Its totient is φ = 3315072.

The previous prime is 9945239. The next prime is 9945253. The reversal of 9945252 is 2525499.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9884736 + 60516 = 3144^2 + 246^2 .

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: 276257 = 9945252 / (9 + 9 + 4 + 5 + 2 + 5 + 2).

It is a d-powerful number, because it can be written as 9² + 9² + 4⁷ + 5⁶ + 2¹⁴ + 5¹⁰ + 2¹⁷ .

It is not an unprimeable number, because it can be changed into a prime (9945253) 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, 138093 + ... + 138164.

Almost surely, 2^9945252 is an apocalyptic number.

It is an amenable number.

9945252 is an abundant number, since it is smaller than the sum of its proper divisors (15194226).

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

9945252 is a wasteful number, since it uses less digits than its factorization.

9945252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276267 (or 276262 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 9945252 is about 3153.6093607167. The cubic root of 9945252 is about 215.0495793358.

The spelling of 9945252 in words is "nine million, nine hundred forty-five thousand, two hundred fifty-two".