4256623 has 4 divisors (see below), whose sum is σ = 4864720. Its totient is φ = 3648528.

The previous prime is 4256617. The next prime is 4256639. The reversal of 4256623 is 3266524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4256623 - 2¹⁷ = 4125551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4256591 and 4256600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304038 + ... + 304051.

It is an arithmetic number, because the mean of its divisors is an integer number (1216180).

Almost surely, 2^4256623 is an apocalyptic number.

4256623 is a deficient number, since it is larger than the sum of its proper divisors (608097).

4256623 is an equidigital number, since it uses as much as digits as its factorization.

4256623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608096.

The product of its digits is 8640, while the sum is 28.

The square root of 4256623 is about 2063.1585009398. The cubic root of 4256623 is about 162.0646873709.

Subtracting from 4256623 its reverse (3266524), we obtain a palindrome (990099).

It can be divided in two parts, 42 and 56623, that added together give a palindrome (56665).

The spelling of 4256623 in words is "four million, two hundred fifty-six thousand, six hundred twenty-three".