1225530442 has 32 divisors (see below), whose sum is σ = 1969201152. Its totient is φ = 570011904.

The previous prime is 1225530389. The next prime is 1225530451. The reversal of 1225530442 is 2440355221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225530442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998928 + ... + 1999540.

It is an arithmetic number, because the mean of its divisors is an integer number (61537536).

Almost surely, 2^1225530442 is an apocalyptic number.

1225530442 is a deficient number, since it is larger than the sum of its proper divisors (743670710).

1225530442 is a wasteful number, since it uses less digits than its factorization.

1225530442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1225530442 is about 35007.5769227177. The cubic root of 1225530442 is about 1070.1418980882.

Adding to 1225530442 its reverse (2440355221), we get a palindrome (3665885663).

The spelling of 1225530442 in words is "one billion, two hundred twenty-five million, five hundred thirty thousand, four hundred forty-two".