22412421 has 6 divisors (see below), whose sum is σ = 32373510. Its totient is φ = 14941608.

The previous prime is 22412393. The next prime is 22412461. The reversal of 22412421 is 12421422.

22412421 is a `hidden beast` number, since 2 + 241 + 2 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 9235521 = 3630^2 + 3039^2 .

It is not a de Polignac number, because 22412421 - 2¹⁰ = 22411397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22412394 and 22412403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22412461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1245126 + ... + 1245143.

It is an arithmetic number, because the mean of its divisors is an integer number (5395585).

Almost surely, 2^22412421 is an apocalyptic number.

It is an amenable number.

22412421 is a deficient number, since it is larger than the sum of its proper divisors (9961089).

22412421 is a wasteful number, since it uses less digits than its factorization.

22412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490275 (or 2490272 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 22412421 is about 4734.1758522471. The cubic root of 22412421 is about 281.9440435225.

Adding to 22412421 its reverse (12421422), we get a palindrome (34833843).

Subtracting from 22412421 its reverse (12421422), we obtain a palindrome (9990999).

The spelling of 22412421 in words is "twenty-two million, four hundred twelve thousand, four hundred twenty-one".