22661421 has 4 divisors (see below), whose sum is σ = 30215232. Its totient is φ = 15107612.

The previous prime is 22661413. The next prime is 22661437. The reversal of 22661421 is 12416622.

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 22661421 - 2³ = 22661413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22661391 and 22661400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22661461) 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 in 3 ways as a sum of consecutive naturals, for example, 3776901 + ... + 3776906.

It is an arithmetic number, because the mean of its divisors is an integer number (7553808).

Almost surely, 2^22661421 is an apocalyptic number.

It is an amenable number.

22661421 is a deficient number, since it is larger than the sum of its proper divisors (7553811).

22661421 is an equidigital number, since it uses as much as digits as its factorization.

22661421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7553810.

The product of its digits is 1152, while the sum is 24.

The square root of 22661421 is about 4760.4013486260. The cubic root of 22661421 is about 282.9843249027.

The spelling of 22661421 in words is "twenty-two million, six hundred sixty-one thousand, four hundred twenty-one".