1421717 has 8 divisors (see below), whose sum is σ = 1559712. Its totient is φ = 1285200.

The previous prime is 1421711. The next prime is 1421731. The reversal of 1421717 is 7171241.

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 1421717 - 2⁸ = 1421461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1421692 and 1421701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 3587.

It is an arithmetic number, because the mean of its divisors is an integer number (194964).

2^1421717 is an apocalyptic number.

It is an amenable number.

1421717 is a deficient number, since it is larger than the sum of its proper divisors (137995).

1421717 is a wasteful number, since it uses less digits than its factorization.

1421717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its digits is 392, while the sum is 23.

The square root of 1421717 is about 1192.3577483289. The cubic root of 1421717 is about 112.4443708509. Note that the first 3 decimals are identical.

Adding to 1421717 its reverse (7171241), we get a palindrome (8592958).

The spelling of 1421717 in words is "one million, four hundred twenty-one thousand, seven hundred seventeen".