1217212469 has 16 divisors (see below), whose sum is σ = 1385947584. Its totient is φ = 1059177600.

The previous prime is 1217212459. The next prime is 1217212471. The reversal of 1217212469 is 9642127121.

It is not a de Polignac number, because 1217212469 - 2⁴ = 1217212453 is a prime.

It is a super-2 number, since 2×1217212469² = 2963212389378151922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217212429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1559 + ... + 49364.

It is an arithmetic number, because the mean of its divisors is an integer number (86621724).

Almost surely, 2^1217212469 is an apocalyptic number.

It is an amenable number.

1217212469 is a deficient number, since it is larger than the sum of its proper divisors (168735115).

1217212469 is a wasteful number, since it uses less digits than its factorization.

1217212469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51028.

The product of its digits is 12096, while the sum is 35.

The square root of 1217212469 is about 34888.5721834529. The cubic root of 1217212469 is about 1067.7152954048.

The spelling of 1217212469 in words is "one billion, two hundred seventeen million, two hundred twelve thousand, four hundred sixty-nine".