5192021 has 4 divisors (see below), whose sum is σ = 5497452. Its totient is φ = 4886592.

The previous prime is 5192009. The next prime is 5192023. The reversal of 5192021 is 1202915.

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 2002225 + 3189796 = 1415^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 5192021 - 2¹⁴ = 5175637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5191984 and 5192002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5192023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152690 + ... + 152723.

It is an arithmetic number, because the mean of its divisors is an integer number (1374363).

Almost surely, 2^5192021 is an apocalyptic number.

It is an amenable number.

5192021 is a deficient number, since it is larger than the sum of its proper divisors (305431).

5192021 is a wasteful number, since it uses less digits than its factorization.

5192021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305430.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 5192021 is about 2278.6006670762. The cubic root of 5192021 is about 173.1591638886.

Adding to 5192021 its reverse (1202915), we get a palindrome (6394936).

The spelling of 5192021 in words is "five million, one hundred ninety-two thousand, twenty-one".