1223425144 has 8 divisors (see below), whose sum is σ = 2293922160. Its totient is φ = 611712568.

The previous prime is 1223425141. The next prime is 1223425193. The reversal of 1223425144 is 4415243221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223425141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76464064 + ... + 76464079.

It is an arithmetic number, because the mean of its divisors is an integer number (286740270).

Almost surely, 2^1223425144 is an apocalyptic number.

It is an amenable number.

1223425144 is a deficient number, since it is larger than the sum of its proper divisors (1070497016).

1223425144 is a wasteful number, since it uses less digits than its factorization.

1223425144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152928149 (or 152928145 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 1223425144 is about 34977.4948216707. The cubic root of 1223425144 is about 1069.5287597952.

Adding to 1223425144 its reverse (4415243221), we get a palindrome (5638668365).

The spelling of 1223425144 in words is "one billion, two hundred twenty-three million, four hundred twenty-five thousand, one hundred forty-four".