9945545 has 16 divisors (see below), whose sum is σ = 12545280. Its totient is φ = 7554624.

The previous prime is 9945539. The next prime is 9945553. The reversal of 9945545 is 5455499.

9945545 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9945545 is a prime.

It is a super-3 number, since 3×9945545³ (a number of 22 digits) contains 333 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22436 + ... + 22874.

It is an arithmetic number, because the mean of its divisors is an integer number (784080).

Almost surely, 2^9945545 is an apocalyptic number.

It is an amenable number.

9945545 is a deficient number, since it is larger than the sum of its proper divisors (2599735).

9945545 is a wasteful number, since it uses less digits than its factorization.

9945545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664.

The product of its digits is 162000, while the sum is 41.

The square root of 9945545 is about 3153.6558150819. The cubic root of 9945545 is about 215.0516911948.

The spelling of 9945545 in words is "nine million, nine hundred forty-five thousand, five hundred forty-five".