2226421 has 2 divisors, whose sum is σ = 2226422. Its totient is φ = 2226420.

The previous prime is 2226409. The next prime is 2226431. The reversal of 2226421 is 1246222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2208196 + 18225 = 1486^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2226421 - 2⁷ = 2226293 is a prime.

2226421 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2226431) 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 as a sum of consecutive naturals, namely, 1113210 + 1113211.

It is an arithmetic number, because the mean of its divisors is an integer number (1113211).

2^2226421 is an apocalyptic number.

It is an amenable number.

2226421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2226421 is an equidigital number, since it uses as much as digits as its factorization.

2226421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 19.

The square root of 2226421 is about 1492.1196332734. The cubic root of 2226421 is about 130.5777246259.

The spelling of 2226421 in words is "two million, two hundred twenty-six thousand, four hundred twenty-one".