3142021 has 2 divisors, whose sum is σ = 3142022.
Its totient is φ = 3142020.
The previous prime is 3142019. The next prime is 3142043. The reversal of 3142021 is 1202413.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1920996 + 1221025 = 1386^2 + 1105^2
It is a cyclic number.
It is not a de Polignac number, because 3142021 - 21 = 3142019 is a prime.
Together with 3142019, it forms a pair of twin primes.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 3141992 and 3142010.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (3142721) 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, 1571010 + 1571011.
It is an arithmetic number, because the mean of its divisors is an integer number (1571011).
Almost surely, 23142021 is an apocalyptic number.
It is an amenable number.
3142021 is a deficient number, since it is larger than the sum of its proper divisors (1).
3142021 is an equidigital number, since it uses as much as digits as its factorization.
3142021 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 48, while the sum is 13.
The square root of 3142021 is about 1772.5746810783.
The cubic root of 3142021 is about 146.4658448723.
Adding to 3142021 its reverse (1202413), we get a palindrome (4344434).
The spelling of 3142021 in words is "three million, one hundred forty-two thousand, twenty-one".