1420717 has 2 divisors, whose sum is σ = 1420718. Its totient is φ = 1420716.

The previous prime is 1420697. The next prime is 1420721. The reversal of 1420717 is 7170241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 749956 + 670761 = 866^2 + 819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1420717 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710358 + 710359.

It is an arithmetic number, because the mean of its divisors is an integer number (710359).

2^1420717 is an apocalyptic number.

It is an amenable number.

1420717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420717 is an equidigital number, since it uses as much as digits as its factorization.

1420717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 1420717 is about 1191.9383373313. The cubic root of 1420717 is about 112.4180011527.

Adding to 1420717 its reverse (7170241), we get a palindrome (8590958).

The spelling of 1420717 in words is "one million, four hundred twenty thousand, seven hundred seventeen".