1212172716 has 48 divisors (see below), whose sum is σ = 2979849600. Its totient is φ = 382459392.

The previous prime is 1212172679. The next prime is 1212172721. The reversal of 1212172716 is 6172712121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517075 + ... + 519413.

It is an arithmetic number, because the mean of its divisors is an integer number (62080200).

Almost surely, 2^1212172716 is an apocalyptic number.

It is an amenable number.

1212172716 is an abundant number, since it is smaller than the sum of its proper divisors (1767676884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212172716 is a wasteful number, since it uses less digits than its factorization.

1212172716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638 (or 4636 counting only the distinct ones).

The product of its digits is 2352, while the sum is 30.

The square root of 1212172716 is about 34816.2708514281. The cubic root of 1212172716 is about 1066.2396655902.

Adding to 1212172716 its reverse (6172712121), we get a palindrome (7384884837).

The spelling of 1212172716 in words is "one billion, two hundred twelve million, one hundred seventy-two thousand, seven hundred sixteen".