22461421 has 2 divisors, whose sum is σ = 22461422. Its totient is φ = 22461420.

The previous prime is 22461419. The next prime is 22461431. The reversal of 22461421 is 12416422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16281225 + 6180196 = 4035^2 + 2486^2 .

It is a cyclic number.

It is not a de Polignac number, because 22461421 - 2¹ = 22461419 is a prime.

Together with 22461419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22461392 and 22461401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22461431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11230710 + 11230711.

It is an arithmetic number, because the mean of its divisors is an integer number (11230711).

Almost surely, 2^22461421 is an apocalyptic number.

It is an amenable number.

22461421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22461421 is an equidigital number, since it uses as much as digits as its factorization.

22461421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

The square root of 22461421 is about 4739.3481619311. The cubic root of 22461421 is about 282.1493642283.

Adding to 22461421 its reverse (12416422), we get a palindrome (34877843).

The spelling of 22461421 in words is "twenty-two million, four hundred sixty-one thousand, four hundred twenty-one".