1217252625 has 16 divisors (see below), whose sum is σ = 2025508992. Its totient is φ = 649201200.

The previous prime is 1217252609. The next prime is 1217252629. The reversal of 1217252625 is 5262527121.

It is not a de Polignac number, because 1217252625 - 2⁴ = 1217252609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1217252629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1622629 + ... + 1623378.

It is an arithmetic number, because the mean of its divisors is an integer number (126594312).

Almost surely, 2^1217252625 is an apocalyptic number.

1217252625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1217252625 is a deficient number, since it is larger than the sum of its proper divisors (808256367).

1217252625 is an equidigital number, since it uses as much as digits as its factorization.

1217252625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246025 (or 3246015 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 1217252625 is about 34889.1476680070. The cubic root of 1217252625 is about 1067.7270366318.

Adding to 1217252625 its reverse (5262527121), we get a palindrome (6479779746).

The spelling of 1217252625 in words is "one billion, two hundred seventeen million, two hundred fifty-two thousand, six hundred twenty-five".