5172021 has 12 divisors (see below), whose sum is σ = 7630272. Its totient is φ = 3374376.

The previous prime is 5172019. The next prime is 5172043. The reversal of 5172021 is 1202715.

It is not a de Polignac number, because 5172021 - 2¹ = 5172019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5171985 and 5172003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5172001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5691 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (635856).

Almost surely, 2^5172021 is an apocalyptic number.

It is an amenable number.

5172021 is a deficient number, since it is larger than the sum of its proper divisors (2458251).

5172021 is a wasteful number, since it uses less digits than its factorization.

5172021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12280 (or 12277 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 5172021 is about 2274.2077741491. The cubic root of 5172021 is about 172.9365376948.

Adding to 5172021 its reverse (1202715), we get a palindrome (6374736).

The spelling of 5172021 in words is "five million, one hundred seventy-two thousand, twenty-one".