4247861 has 4 divisors (see below), whose sum is σ = 4254432. Its totient is φ = 4241292.

The previous prime is 4247827. The next prime is 4247863. The reversal of 4247861 is 1687424.

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 a cyclic number.

It is not a de Polignac number, because 4247861 - 2¹⁸ = 3985717 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 (4247863) 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, 2195 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (1063608).

Almost surely, 2^4247861 is an apocalyptic number.

It is an amenable number.

4247861 is a deficient number, since it is larger than the sum of its proper divisors (6571).

4247861 is an equidigital number, since it uses as much as digits as its factorization.

4247861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6570.

The product of its digits is 10752, while the sum is 32.

The square root of 4247861 is about 2061.0339638152. The cubic root of 4247861 is about 161.9534108776.

The spelling of 4247861 in words is "four million, two hundred forty-seven thousand, eight hundred sixty-one".