4142729 has 4 divisors (see below), whose sum is σ = 4147476. Its totient is φ = 4137984.

The previous prime is 4142707. The next prime is 4142753. The reversal of 4142729 is 9272414.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9272414 = 2 ⋅4636207.

It can be written as a sum of positive squares in 2 ways, for example, as 2325625 + 1817104 = 1525^2 + 1348^2 .

It is a cyclic number.

It is not a de Polignac number, because 4142729 - 2⁸ = 4142473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142029) 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, 644 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (1036869).

Almost surely, 2^4142729 is an apocalyptic number.

It is an amenable number.

4142729 is a deficient number, since it is larger than the sum of its proper divisors (4747).

4142729 is a wasteful number, since it uses less digits than its factorization.

4142729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746.

The product of its digits is 4032, while the sum is 29.

The square root of 4142729 is about 2035.3694996241. The cubic root of 4142729 is about 160.6061512501.

The spelling of 4142729 in words is "four million, one hundred forty-two thousand, seven hundred twenty-nine".