22406249 has 4 divisors (see below), whose sum is σ = 22426836. Its totient is φ = 22385664.

The previous prime is 22406239. The next prime is 22406261. The reversal of 22406249 is 94260422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94260422 = 2 ⋅47130211.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 13213225 = 3032^2 + 3635^2 .

It is a cyclic number.

It is not a de Polignac number, because 22406249 - 2⁴ = 22406233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22406239) 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, 8564 + ... + 10869.

It is an arithmetic number, because the mean of its divisors is an integer number (5606709).

Almost surely, 2^22406249 is an apocalyptic number.

It is an amenable number.

22406249 is a deficient number, since it is larger than the sum of its proper divisors (20587).

22406249 is a wasteful number, since it uses less digits than its factorization.

22406249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20586.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 22406249 is about 4733.5239515608. The cubic root of 22406249 is about 281.9181602797.

The spelling of 22406249 in words is "twenty-two million, four hundred six thousand, two hundred forty-nine".