3142729 has 2 divisors, whose sum is σ = 3142730. Its totient is φ = 3142728.

The previous prime is 3142721. The next prime is 3142747. The reversal of 3142729 is 9272413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1750329 + 1392400 = 1323^2 + 1180^2 .

It is an emirp because it is prime and its reverse (9272413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3142729 - 2³ = 3142721 is a prime.

3142729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3142697 and 3142706.

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, 1571364 + 1571365.

It is an arithmetic number, because the mean of its divisors is an integer number (1571365).

Almost surely, 2^3142729 is an apocalyptic number.

It is an amenable number.

3142729 is a deficient number, since it is larger than the sum of its proper divisors (1).

3142729 is an equidigital number, since it uses as much as digits as its factorization.

3142729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 3142729 is about 1772.7743793275. The cubic root of 3142729 is about 146.4768452263.

The spelling of 3142729 in words is "three million, one hundred forty-two thousand, seven hundred twenty-nine".