1217252626 has 16 divisors (see below), whose sum is σ = 1838073600. Its totient is φ = 604569168.

The previous prime is 1217252609. The next prime is 1217252629. The reversal of 1217252626 is 6262527121.

It is a junction number, because it is equal to n+sod(n) for n = 1217252591 and 1217252600.

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 7 ways as a sum of consecutive naturals, for example, 628756 + ... + 630688.

It is an arithmetic number, because the mean of its divisors is an integer number (114879600).

Almost surely, 2^1217252626 is an apocalyptic number.

1217252626 is a deficient number, since it is larger than the sum of its proper divisors (620820974).

1217252626 is a wasteful number, since it uses less digits than its factorization.

1217252626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873.

The product of its digits is 20160, while the sum is 34.

The square root of 1217252626 is about 34889.1476823381. The cubic root of 1217252626 is about 1067.7270369242.

Adding to 1217252626 its reverse (6262527121), we get a palindrome (7479779747).

The spelling of 1217252626 in words is "one billion, two hundred seventeen million, two hundred fifty-two thousand, six hundred twenty-six".