1217420927 has 8 divisors (see below), whose sum is σ = 1255019280. Its totient is φ = 1180388160.

The previous prime is 1217420917. The next prime is 1217420969. The reversal of 1217420927 is 7290247121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1217420927 - 2²⁰ = 1216372351 is a prime.

It is a super-2 number, since 2×1217420927² = 2964227426995078658, 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 (1217420917) 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, 137024 + ... + 145637.

It is an arithmetic number, because the mean of its divisors is an integer number (156877410).

Almost surely, 2^1217420927 is an apocalyptic number.

1217420927 is a deficient number, since it is larger than the sum of its proper divisors (37598353).

1217420927 is an equidigital number, since it uses as much as digits as its factorization.

1217420927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282793.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1217420927 is about 34891.5595380889. The cubic root of 1217420927 is about 1067.7762437043.

The spelling of 1217420927 in words is "one billion, two hundred seventeen million, four hundred twenty thousand, nine hundred twenty-seven".