22405242 has 16 divisors (see below), whose sum is σ = 44871840. Its totient is φ = 7458192.

The previous prime is 22405241. The next prime is 22405247. The reversal of 22405242 is 24250422.

It is not an unprimeable number, because it can be changed into a prime (22405241) 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 7 ways as a sum of consecutive naturals, for example, 3184 + ... + 7412.

It is an arithmetic number, because the mean of its divisors is an integer number (2804490).

Almost surely, 2^22405242 is an apocalyptic number.

22405242 is an abundant number, since it is smaller than the sum of its proper divisors (22466598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22405242 is a wasteful number, since it uses less digits than its factorization.

22405242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 22405242 is about 4733.4175814099. The cubic root of 22405242 is about 281.9139368175.

Adding to 22405242 its reverse (24250422), we get a palindrome (46655664).

The spelling of 22405242 in words is "twenty-two million, four hundred five thousand, two hundred forty-two".