4047861 has 4 divisors (see below), whose sum is σ = 5397152. Its totient is φ = 2698572.

The previous prime is 4047847. The next prime is 4047929. The reversal of 4047861 is 1687404.

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.

It is not a de Polignac number, because 4047861 - 2⁵ = 4047829 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4047811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674641 + ... + 674646.

It is an arithmetic number, because the mean of its divisors is an integer number (1349288).

Almost surely, 2^4047861 is an apocalyptic number.

It is an amenable number.

4047861 is a deficient number, since it is larger than the sum of its proper divisors (1349291).

4047861 is a wasteful number, since it uses less digits than its factorization.

4047861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349290.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 4047861 is about 2011.9296707390. The cubic root of 4047861 is about 159.3707183779.

The spelling of 4047861 in words is "four million, forty-seven thousand, eight hundred sixty-one".