1243245225 has 48 divisors (see below), whose sum is σ = 2132452800. Its totient is φ = 638373120.

The previous prime is 1243245187. The next prime is 1243245239. The reversal of 1243245225 is 5225423421.

It is not a de Polignac number, because 1243245225 - 2⁶ = 1243245161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243245192 and 1243245201.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1106514 + ... + 1107636.

It is an arithmetic number, because the mean of its divisors is an integer number (44426100).

Almost surely, 2^1243245225 is an apocalyptic number.

1243245225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243245225 is a deficient number, since it is larger than the sum of its proper divisors (889207575).

1243245225 is a wasteful number, since it uses less digits than its factorization.

1243245225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1669 counting only the distinct ones).

The product of its digits is 19200, while the sum is 30.

The square root of 1243245225 is about 35259.6827126961. The cubic root of 1243245225 is about 1075.2734764835.

Adding to 1243245225 its reverse (5225423421), we get a palindrome (6468668646).

The spelling of 1243245225 in words is "one billion, two hundred forty-three million, two hundred forty-five thousand, two hundred twenty-five".