3998145 has 16 divisors (see below), whose sum is σ = 6773760. Its totient is φ = 2006784.

The previous prime is 3998131. The next prime is 3998171. The reversal of 3998145 is 5418993.

It is a de Polignac number, because none of the positive numbers 2^k-3998145 is a prime.

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, 7585 + ... + 8094.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^3998145 is an apocalyptic number.

It is an amenable number.

3998145 is a deficient number, since it is larger than the sum of its proper divisors (2775615).

3998145 is a wasteful number, since it uses less digits than its factorization.

3998145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15704.

The product of its digits is 38880, while the sum is 39.

The square root of 3998145 is about 1999.5361962215. The cubic root of 3998145 is about 158.7155628280.

The spelling of 3998145 in words is "three million, nine hundred ninety-eight thousand, one hundred forty-five".