4239891 has 16 divisors (see below), whose sum is σ = 6313120. Its totient is φ = 2812320.

The previous prime is 4239881. The next prime is 4239923. The reversal of 4239891 is 1989324.

It is not a de Polignac number, because 4239891 - 2⁹ = 4239379 is a prime.

It is a Duffinian 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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9861 + ... + 10281.

It is an arithmetic number, because the mean of its divisors is an integer number (394570).

Almost surely, 2^4239891 is an apocalyptic number.

4239891 is a deficient number, since it is larger than the sum of its proper divisors (2073229).

4239891 is a wasteful number, since it uses less digits than its factorization.

4239891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 797 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 4239891 is about 2059.0995604875. The cubic root of 4239891 is about 161.8520597277.

The spelling of 4239891 in words is "four million, two hundred thirty-nine thousand, eight hundred ninety-one".