4456421 has 2 divisors, whose sum is σ = 4456422. Its totient is φ = 4456420.

The previous prime is 4456373. The next prime is 4456427. The reversal of 4456421 is 1246544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4456321 + 100 = 2111^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 4456421 - 2⁶ = 4456357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4456427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2228210 + 2228211.

It is an arithmetic number, because the mean of its divisors is an integer number (2228211).

Almost surely, 2^4456421 is an apocalyptic number.

It is an amenable number.

4456421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4456421 is an equidigital number, since it uses as much as digits as its factorization.

4456421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 26.

The square root of 4456421 is about 2111.0236853243. The cubic root of 4456421 is about 164.5616894609.

It can be divided in two parts, 44 and 56421, that added together give a palindrome (56465).

The spelling of 4456421 in words is "four million, four hundred fifty-six thousand, four hundred twenty-one".