1217712412 has 24 divisors (see below), whose sum is σ = 2439471104. Its totient is φ = 521009712.

The previous prime is 1217712403. The next prime is 1217712427. The reversal of 1217712412 is 2142177121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18828 + ... + 52819.

Almost surely, 2^1217712412 is an apocalyptic number.

It is an amenable number.

1217712412 is an abundant number, since it is smaller than the sum of its proper divisors (1221758692).

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

1217712412 is a wasteful number, since it uses less digits than its factorization.

1217712412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72265 (or 72263 counting only the distinct ones).

The product of its digits is 1568, while the sum is 28.

The square root of 1217712412 is about 34895.7363011586. The cubic root of 1217712412 is about 1067.8614555142.

Adding to 1217712412 its reverse (2142177121), we get a palindrome (3359889533).

The spelling of 1217712412 in words is "one billion, two hundred seventeen million, seven hundred twelve thousand, four hundred twelve".