1225535409 has 12 divisors (see below), whose sum is σ = 2023106176. Its totient is φ = 700305912.

The previous prime is 1225535401. The next prime is 1225535411. The reversal of 1225535409 is 9045355221.

It is a happy number.

It is not a de Polignac number, because 1225535409 - 2³ = 1225535401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225535401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9726409 + ... + 9726534.

Almost surely, 2^1225535409 is an apocalyptic number.

It is an amenable number.

1225535409 is a deficient number, since it is larger than the sum of its proper divisors (797570767).

1225535409 is a wasteful number, since it uses less digits than its factorization.

1225535409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19452956 (or 19452953 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1225535409 is about 35007.6478644310. The cubic root of 1225535409 is about 1070.1433438262.

The spelling of 1225535409 in words is "one billion, two hundred twenty-five million, five hundred thirty-five thousand, four hundred nine".