4025729 has 4 divisors (see below), whose sum is σ = 4033284. Its totient is φ = 4018176.

The previous prime is 4025717. The next prime is 4025743. The reversal of 4025729 is 9275204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2755600 + 1270129 = 1660^2 + 1127^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025729 - 2¹⁶ = 3960193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4025779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2912 + ... + 4065.

It is an arithmetic number, because the mean of its divisors is an integer number (1008321).

Almost surely, 2^4025729 is an apocalyptic number.

It is an amenable number.

4025729 is a deficient number, since it is larger than the sum of its proper divisors (7555).

4025729 is an equidigital number, since it uses as much as digits as its factorization.

4025729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 4025729 is about 2006.4219396727. The cubic root of 4025729 is about 159.0797300642.

The spelling of 4025729 in words is "four million, twenty-five thousand, seven hundred twenty-nine".