1243055225 has 24 divisors (see below), whose sum is σ = 1555614720. Its totient is φ = 985315520.

The previous prime is 1243055213. The next prime is 1243055243. The reversal of 1243055225 is 5225503421.

It is not a de Polignac number, because 1243055225 - 2¹² = 1243051129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1885946 + ... + 1886604.

It is an arithmetic number, because the mean of its divisors is an integer number (64817280).

Almost surely, 2^1243055225 is an apocalyptic number.

It is an amenable number.

1243055225 is a deficient number, since it is larger than the sum of its proper divisors (312559495).

1243055225 is a wasteful number, since it uses less digits than its factorization.

1243055225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1243055225 is about 35256.9883143754. The cubic root of 1243055225 is about 1075.2186971676.

Adding to 1243055225 its reverse (5225503421), we get a palindrome (6468558646).

The spelling of 1243055225 in words is "one billion, two hundred forty-three million, fifty-five thousand, two hundred twenty-five".