2121417 has 8 divisors (see below), whose sum is σ = 3142880. Its totient is φ = 1414260.

The previous prime is 2121403. The next prime is 2121433. The reversal of 2121417 is 7141212.

It is not a de Polignac number, because 2121417 - 2⁷ = 2121289 is a prime.

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 2121417.

It is not an unprimeable number, because it can be changed into a prime (2121017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39259 + ... + 39312.

It is an arithmetic number, because the mean of its divisors is an integer number (392860).

2^2121417 is an apocalyptic number.

2121417 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2121417 is a deficient number, since it is larger than the sum of its proper divisors (1021463).

2121417 is an equidigital number, since it uses as much as digits as its factorization.

2121417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78580 (or 78574 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 2121417 is about 1456.5084963707. The cubic root of 2121417 is about 128.4917808285.

Adding to 2121417 its reverse (7141212), we get a palindrome (9262629).

The spelling of 2121417 in words is "two million, one hundred twenty-one thousand, four hundred seventeen".