1225431604 has 12 divisors (see below), whose sum is σ = 2270652804. Its totient is φ = 576673664.

The previous prime is 1225431589. The next prime is 1225431617. The reversal of 1225431604 is 4061345221.

It can be written as a sum of positive squares in 2 ways, for example, as 938196900 + 287234704 = 30630^2 + 16948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9010459 + ... + 9010594.

It is an arithmetic number, because the mean of its divisors is an integer number (189221067).

Almost surely, 2^1225431604 is an apocalyptic number.

It is an amenable number.

1225431604 is a deficient number, since it is larger than the sum of its proper divisors (1045221200).

1225431604 is a wasteful number, since it uses less digits than its factorization.

1225431604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18021074 (or 18021072 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1225431604 is about 35006.1652284280. The cubic root of 1225431604 is about 1070.1131286333.

Adding to 1225431604 its reverse (4061345221), we get a palindrome (5286776825).

The spelling of 1225431604 in words is "one billion, two hundred twenty-five million, four hundred thirty-one thousand, six hundred four".