4226921 has 4 divisors (see below), whose sum is σ = 4232592. Its totient is φ = 4221252.

The previous prime is 4226903. The next prime is 4226933. The reversal of 4226921 is 1296224.

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 4226921 - 2¹⁸ = 3964777 is a prime.

It is a super-2 number, since 2×4226921² = 35733722280482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4226221) 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, 1511 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (1058148).

Almost surely, 2^4226921 is an apocalyptic number.

It is an amenable number.

4226921 is a deficient number, since it is larger than the sum of its proper divisors (5671).

4226921 is an equidigital number, since it uses as much as digits as its factorization.

4226921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670.

The product of its digits is 1728, while the sum is 26.

The square root of 4226921 is about 2055.9477133429. The cubic root of 4226921 is about 161.6868537988.

The spelling of 4226921 in words is "four million, two hundred twenty-six thousand, nine hundred twenty-one".