1217252630 has 16 divisors (see below), whose sum is σ = 2390241744. Its totient is φ = 442637280.

The previous prime is 1217252629. The next prime is 1217252633. The reversal of 1217252630 is 362527121.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1217252593 and 1217252602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217252633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5532857 + ... + 5533076.

It is an arithmetic number, because the mean of its divisors is an integer number (149390109).

Almost surely, 2^1217252630 is an apocalyptic number.

1217252630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217252630 is a deficient number, since it is larger than the sum of its proper divisors (1172989114).

1217252630 is a wasteful number, since it uses less digits than its factorization.

1217252630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11065951.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1217252630 is about 34889.1477396625. The cubic root of 1217252630 is about 1067.7270380938.

Adding to 1217252630 its reverse (362527121), we get a palindrome (1579779751).

The spelling of 1217252630 in words is "one billion, two hundred seventeen million, two hundred fifty-two thousand, six hundred thirty".