3998541 has 4 divisors (see below), whose sum is σ = 5331392. Its totient is φ = 2665692.

The previous prime is 3998539. The next prime is 3998551. The reversal of 3998541 is 1458993.

3998541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1458993 = 3 ⋅486331.

It is not a de Polignac number, because 3998541 - 2¹ = 3998539 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3998541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666421 + ... + 666426.

It is an arithmetic number, because the mean of its divisors is an integer number (1332848).

Almost surely, 2^3998541 is an apocalyptic number.

It is an amenable number.

3998541 is a deficient number, since it is larger than the sum of its proper divisors (1332851).

3998541 is a wasteful number, since it uses less digits than its factorization.

3998541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332850.

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

The square root of 3998541 is about 1999.6352167333. The cubic root of 3998541 is about 158.7208026986.

The spelling of 3998541 in words is "three million, nine hundred ninety-eight thousand, five hundred forty-one".