4018961 has 4 divisors (see below), whose sum is σ = 4023732. Its totient is φ = 4014192.

The previous prime is 4018921. The next prime is 4018979. The reversal of 4018961 is 1698104.

4018961 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3682561 + 336400 = 1919^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 4018961 - 2⁶ = 4018897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4018901) 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, 746 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (1005933).

Almost surely, 2^4018961 is an apocalyptic number.

It is an amenable number.

4018961 is a deficient number, since it is larger than the sum of its proper divisors (4771).

4018961 is a wasteful number, since it uses less digits than its factorization.

4018961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 4018961 is about 2004.7346457823. The cubic root of 4018961 is about 158.9905325112.

The spelling of 4018961 in words is "four million, eighteen thousand, nine hundred sixty-one".