4172729 has 8 divisors (see below), whose sum is σ = 4750272. Its totient is φ = 3628240.

The previous prime is 4172719. The next prime is 4172731. The reversal of 4172729 is 9272714.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-4172729 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 = 4172695 and 4172704.

It is not an unprimeable number, because it can be changed into a prime (4172719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7994 + ... + 8499.

It is an arithmetic number, because the mean of its divisors is an integer number (593784).

Almost surely, 2^4172729 is an apocalyptic number.

It is an amenable number.

4172729 is a deficient number, since it is larger than the sum of its proper divisors (577543).

4172729 is a wasteful number, since it uses less digits than its factorization.

4172729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16527.

The product of its digits is 7056, while the sum is 32.

The square root of 4172729 is about 2042.7258749034. The cubic root of 4172729 is about 160.9929011954.

The spelling of 4172729 in words is "four million, one hundred seventy-two thousand, seven hundred twenty-nine".