1225422243 has 16 divisors (see below), whose sum is σ = 1834160160. Its totient is φ = 808524288.

The previous prime is 1225422223. The next prime is 1225422257. The reversal of 1225422243 is 3422245221.

It is not a de Polignac number, because 1225422243 - 2⁸ = 1225421987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1225422223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231330 + ... + 236567.

It is an arithmetic number, because the mean of its divisors is an integer number (114635010).

Almost surely, 2^1225422243 is an apocalyptic number.

1225422243 is a deficient number, since it is larger than the sum of its proper divisors (608737917).

1225422243 is an equidigital number, since it uses as much as digits as its factorization.

1225422243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468003 (or 467997 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 1225422243 is about 35006.0315231533. The cubic root of 1225422243 is about 1070.1104037826.

Adding to 1225422243 its reverse (3422245221), we get a palindrome (4647667464).

The spelling of 1225422243 in words is "one billion, two hundred twenty-five million, four hundred twenty-two thousand, two hundred forty-three".