1217212470 has 48 divisors (see below), whose sum is σ = 3169241712. Its totient is φ = 324129600.

The previous prime is 1217212459. The next prime is 1217212471. The reversal of 1217212470 is 742127121.

It is a happy number.

1217212470 is a `hidden beast` number, since 12 + 172 + 12 + 470 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217212471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56745 + ... + 75195.

It is an arithmetic number, because the mean of its divisors is an integer number (66025869).

Almost surely, 2^1217212470 is an apocalyptic number.

1217212470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1217212470 is an abundant number, since it is smaller than the sum of its proper divisors (1952029242).

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

1217212470 is a wasteful number, since it uses less digits than its factorization.

1217212470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19197 (or 19194 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 1217212470 is about 34888.5721977842. The cubic root of 1217212470 is about 1067.7152956972.

Adding to 1217212470 its reverse (742127121), we get a palindrome (1959339591).

It can be divided in two parts, 12172 and 12470, that added together give a palindrome (24642).

The spelling of 1217212470 in words is "one billion, two hundred seventeen million, two hundred twelve thousand, four hundred seventy".