1428617 has 4 divisors (see below), whose sum is σ = 1431300. Its totient is φ = 1425936.

The previous prime is 1428613. The next prime is 1428631. The reversal of 1428617 is 7168241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7168241 = 149 ⋅48109.

It can be written as a sum of positive squares in 2 ways, for example, as 1301881 + 126736 = 1141^2 + 356^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428617 - 2² = 1428613 is a prime.

It is a super-3 number, since 3×1428617³ = 8747192738071683339, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428617.

It is not an unprimeable number, because it can be changed into a prime (1428613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 1707.

It is an arithmetic number, because the mean of its divisors is an integer number (357825).

2^1428617 is an apocalyptic number.

It is an amenable number.

1428617 is a deficient number, since it is larger than the sum of its proper divisors (2683).

1428617 is an equidigital number, since it uses as much as digits as its factorization.

1428617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its digits is 2688, while the sum is 29.

The square root of 1428617 is about 1195.2476730787. The cubic root of 1428617 is about 112.6259856085.

The spelling of 1428617 in words is "one million, four hundred twenty-eight thousand, six hundred seventeen".