5142121 has 2 divisors, whose sum is σ = 5142122. Its totient is φ = 5142120.

The previous prime is 5142119. The next prime is 5142131. The reversal of 5142121 is 1212415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 2062096 = 1755^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 5142121 - 2¹ = 5142119 is a prime.

Together with 5142119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 5142095 and 5142104.

It is not a weakly prime, because it can be changed into another prime (5142101) 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 as a sum of consecutive naturals, namely, 2571060 + 2571061.

It is an arithmetic number, because the mean of its divisors is an integer number (2571061).

Almost surely, 2^5142121 is an apocalyptic number.

It is an amenable number.

5142121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5142121 is an equidigital number, since it uses as much as digits as its factorization.

5142121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 16.

The square root of 5142121 is about 2267.6245280028. The cubic root of 5142121 is about 172.6026386302.

Adding to 5142121 its reverse (1212415), we get a palindrome (6354536).

The spelling of 5142121 in words is "five million, one hundred forty-two thousand, one hundred twenty-one".