2128417 has 4 divisors (see below), whose sum is σ = 2253636. Its totient is φ = 2003200.

The previous prime is 2128409. The next prime is 2128439. The reversal of 2128417 is 7148212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1274641 + 853776 = 1129^2 + 924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128417 - 2³ = 2128409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2128391 and 2128400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128447) 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, 62584 + ... + 62617.

It is an arithmetic number, because the mean of its divisors is an integer number (563409).

2^2128417 is an apocalyptic number.

It is an amenable number.

2128417 is a deficient number, since it is larger than the sum of its proper divisors (125219).

2128417 is a wasteful number, since it uses less digits than its factorization.

2128417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125218.

The product of its digits is 896, while the sum is 25.

The square root of 2128417 is about 1458.9095242680. The cubic root of 2128417 is about 128.6329529766.

The spelling of 2128417 in words is "two million, one hundred twenty-eight thousand, four hundred seventeen".