4256861 has 4 divisors (see below), whose sum is σ = 4864992. Its totient is φ = 3648732.

The previous prime is 4256839. The next prime is 4256897. The reversal of 4256861 is 1686524.

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 4256861 - 2⁶ = 4256797 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 (4256831) 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 3 ways as a sum of consecutive naturals, for example, 304055 + ... + 304068.

It is an arithmetic number, because the mean of its divisors is an integer number (1216248).

Almost surely, 2^4256861 is an apocalyptic number.

It is an amenable number.

4256861 is a deficient number, since it is larger than the sum of its proper divisors (608131).

4256861 is an equidigital number, since it uses as much as digits as its factorization.

4256861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608130.

The product of its digits is 11520, while the sum is 32.

The square root of 4256861 is about 2063.2161786880. The cubic root of 4256861 is about 162.0677078151.

The spelling of 4256861 in words is "four million, two hundred fifty-six thousand, eight hundred sixty-one".