4018861 has 32 divisors (see below), whose sum is σ = 5483520. Its totient is φ = 2851200.

The previous prime is 4018853. The next prime is 4018867. The reversal of 4018861 is 1688104.

It is not a de Polignac number, because 4018861 - 2³ = 4018853 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4018867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59950 + ... + 60016.

It is an arithmetic number, because the mean of its divisors is an integer number (171360).

Almost surely, 2^4018861 is an apocalyptic number.

4018861 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4018861 is a deficient number, since it is larger than the sum of its proper divisors (1464659).

4018861 is a wasteful number, since it uses less digits than its factorization.

4018861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 4018861 is about 2004.7097046705. The cubic root of 4018861 is about 158.9892138300.

The spelling of 4018861 in words is "four million, eighteen thousand, eight hundred sixty-one".