3998245 has 8 divisors (see below), whose sum is σ = 4876920. Its totient is φ = 3145920.

The previous prime is 3998233. The next prime is 3998249. The reversal of 3998245 is 5428993.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6241 + 3992004 = 79^2 + 1998^2 .

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

It is not a de Polignac number, because 3998245 - 2¹⁹ = 3473957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3998198 and 3998207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6250 + ... + 6859.

It is an arithmetic number, because the mean of its divisors is an integer number (609615).

Almost surely, 2^3998245 is an apocalyptic number.

It is an amenable number.

3998245 is a deficient number, since it is larger than the sum of its proper divisors (878675).

3998245 is a wasteful number, since it uses less digits than its factorization.

3998245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13175.

The product of its digits is 77760, while the sum is 40.

The square root of 3998245 is about 1999.5612018640. The cubic root of 3998245 is about 158.7168860603.

The spelling of 3998245 in words is "three million, nine hundred ninety-eight thousand, two hundred forty-five".