3998545 has 8 divisors (see below), whose sum is σ = 4809024. Its totient is φ = 3191664.

The previous prime is 3998539. The next prime is 3998551. The reversal of 3998545 is 5458993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3998539) and next prime (3998551).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3998545 - 2³ = 3998537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3652 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (601128).

Almost surely, 2^3998545 is an apocalyptic number.

It is an amenable number.

3998545 is a deficient number, since it is larger than the sum of its proper divisors (810479).

3998545 is an equidigital number, since it uses as much as digits as its factorization.

3998545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its digits is 194400, while the sum is 43.

The square root of 3998545 is about 1999.6362169155. The cubic root of 3998545 is about 158.7208556249.

The spelling of 3998545 in words is "three million, nine hundred ninety-eight thousand, five hundred forty-five".