2247421 has 4 divisors (see below), whose sum is σ = 2451744. Its totient is φ = 2043100.

The previous prime is 2247409. The next prime is 2247433. The reversal of 2247421 is 1247422.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (2247409) and next prime (2247433).

It is a cyclic number.

It is not a de Polignac number, because 2247421 - 2⁵ = 2247389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2247392 and 2247401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2247461) 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, 102145 + ... + 102166.

It is an arithmetic number, because the mean of its divisors is an integer number (612936).

2^2247421 is an apocalyptic number.

It is an amenable number.

2247421 is a deficient number, since it is larger than the sum of its proper divisors (204323).

2247421 is a wasteful number, since it uses less digits than its factorization.

2247421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204322.

The product of its digits is 896, while the sum is 22.

The square root of 2247421 is about 1499.1400868498. The cubic root of 2247421 is about 130.9869847023.

Subtracting from 2247421 its reverse (1247422), we obtain a palindrome (999999).

The spelling of 2247421 in words is "two million, two hundred forty-seven thousand, four hundred twenty-one".