1225404024 has 128 divisors (see below), whose sum is σ = 3398841600. Its totient is φ = 365783040.

The previous prime is 1225404017. The next prime is 1225404029. The reversal of 1225404024 is 4204045221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1225403985 and 1225404003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225404029) 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 31 ways as a sum of consecutive naturals, for example, 3233067 + ... + 3233445.

It is an arithmetic number, because the mean of its divisors is an integer number (26553450).

Almost surely, 2^1225404024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225404024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699420800).

1225404024 is an abundant number, since it is smaller than the sum of its proper divisors (2173437576).

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

1225404024 is a wasteful number, since it uses less digits than its factorization.

1225404024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1225404024 is about 35005.7712956021. The cubic root of 1225404024 is about 1070.1051004573.

Adding to 1225404024 its reverse (4204045221), we get a palindrome (5429449245).

The spelling of 1225404024 in words is "one billion, two hundred twenty-five million, four hundred four thousand, twenty-four".