4239861 has 8 divisors (see below), whose sum is σ = 5668320. Its totient is φ = 2818992.

The previous prime is 4239857. The next prime is 4239877. The reversal of 4239861 is 1689324.

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

It is not a de Polignac number, because 4239861 - 2² = 4239857 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4239811) 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 7 ways as a sum of consecutive naturals, for example, 430 + ... + 2943.

It is an arithmetic number, because the mean of its divisors is an integer number (708540).

Almost surely, 2^4239861 is an apocalyptic number.

It is an amenable number.

4239861 is a deficient number, since it is larger than the sum of its proper divisors (1428459).

4239861 is a wasteful number, since it uses less digits than its factorization.

4239861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795.

The product of its digits is 10368, while the sum is 33.

The square root of 4239861 is about 2059.0922757371. The cubic root of 4239861 is about 161.8516779905.

It can be divided in two parts, 42 and 39861, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 4239861 in words is "four million, two hundred thirty-nine thousand, eight hundred sixty-one".