9999045 has 40 divisors (see below), whose sum is σ = 20490624. Its totient is φ = 4569696.

The previous prime is 9998977. The next prime is 9999047. The reversal of 9999045 is 5409999.

It is a happy number.

It is not a de Polignac number, because 9999045 - 2¹⁵ = 9966277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

9999045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999047) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1072 + ... + 4598.

Almost surely, 2^9999045 is an apocalyptic number.

It is an amenable number.

9999045 is an abundant number, since it is smaller than the sum of its proper divisors (10491579).

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

9999045 is a wasteful number, since it uses less digits than its factorization.

9999045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3551 (or 3542 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 9999045 is about 3162.1266578048. The cubic root of 9999045 is about 215.4366105011.

The spelling of 9999045 in words is "nine million, nine hundred ninety-nine thousand, forty-five".