9945145 has 16 divisors (see below), whose sum is σ = 13845888. Its totient is φ = 6716160.

The previous prime is 9945137. The next prime is 9945149. The reversal of 9945145 is 5415499.

It is not a de Polignac number, because 9945145 - 2³ = 9945137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9945149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225 + ... + 4465.

It is an arithmetic number, because the mean of its divisors is an integer number (865368).

Almost surely, 2^9945145 is an apocalyptic number.

It is an amenable number.

9945145 is a deficient number, since it is larger than the sum of its proper divisors (3900743).

9945145 is a wasteful number, since it uses less digits than its factorization.

9945145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320.

The product of its digits is 32400, while the sum is 37.

The square root of 9945145 is about 3153.5923959827. The cubic root of 9945145 is about 215.0488081006.

The spelling of 9945145 in words is "nine million, nine hundred forty-five thousand, one hundred forty-five".