22492421 has 6 divisors (see below), whose sum is σ = 26164710. Its totient is φ = 19279176.

The previous prime is 22492417. The next prime is 22492423. The reversal of 22492421 is 12429422.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12348196 + 10144225 = 3514^2 + 3185^2 .

It is not a de Polignac number, because 22492421 - 2² = 22492417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22492423) 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, 229466 + ... + 229563.

It is an arithmetic number, because the mean of its divisors is an integer number (4360785).

Almost surely, 2^22492421 is an apocalyptic number.

It is an amenable number.

22492421 is a deficient number, since it is larger than the sum of its proper divisors (3672289).

22492421 is an equidigital number, since it uses as much as digits as its factorization.

22492421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459043 (or 459036 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 22492421 is about 4742.6175262190. The cubic root of 22492421 is about 282.2791068287.

The spelling of 22492421 in words is "twenty-two million, four hundred ninety-two thousand, four hundred twenty-one".