2505729 has 8 divisors (see below), whose sum is σ = 3359232. Its totient is φ = 1661360.

The previous prime is 2505707. The next prime is 2505743. The reversal of 2505729 is 9275052.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2505729 - 2¹⁵ = 2472961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2505696 and 2505705.

It is not an unprimeable number, because it can be changed into a prime (2505779) 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, 1614 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (419904).

2^2505729 is an apocalyptic number.

It is an amenable number.

2505729 is a deficient number, since it is larger than the sum of its proper divisors (853503).

2505729 is a wasteful number, since it uses less digits than its factorization.

2505729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4567.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 2505729 is about 1582.9494622381. The cubic root of 2505729 is about 135.8244743952.

The spelling of 2505729 in words is "two million, five hundred five thousand, seven hundred twenty-nine".