1217001427 has 2 divisors, whose sum is σ = 1217001428. Its totient is φ = 1217001426.

The previous prime is 1217001413. The next prime is 1217001431. The reversal of 1217001427 is 7241007121.

It is a strong prime.

It is an emirp because it is prime and its reverse (7241007121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217001427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1217001407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608500713 + 608500714.

It is an arithmetic number, because the mean of its divisors is an integer number (608500714).

Almost surely, 2^1217001427 is an apocalyptic number.

1217001427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217001427 is an equidigital number, since it uses as much as digits as its factorization.

1217001427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 1217001427 is about 34885.5475376265. The cubic root of 1217001427 is about 1067.6535845145.

Adding to 1217001427 its reverse (7241007121), we get a palindrome (8458008548).

The spelling of 1217001427 in words is "one billion, two hundred seventeen million, one thousand, four hundred twenty-seven".