1214281217 has 2 divisors, whose sum is σ = 1214281218. Its totient is φ = 1214281216.

The previous prime is 1214281193. The next prime is 1214281247. The reversal of 1214281217 is 7121824121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825757696 + 388523521 = 28736^2 + 19711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214281217 - 2⁶ = 1214281153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1214281217.

It is not a weakly prime, because it can be changed into another prime (1214281247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607140608 + 607140609.

It is an arithmetic number, because the mean of its divisors is an integer number (607140609).

Almost surely, 2^1214281217 is an apocalyptic number.

It is an amenable number.

1214281217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214281217 is an equidigital number, since it uses as much as digits as its factorization.

1214281217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 29.

The square root of 1214281217 is about 34846.5380920401. The cubic root of 1214281217 is about 1066.8575272510.

The spelling of 1214281217 in words is "one billion, two hundred fourteen million, two hundred eighty-one thousand, two hundred seventeen".