2725721 has 8 divisors (see below), whose sum is σ = 2940000. Its totient is φ = 2518560.

The previous prime is 2725711. The next prime is 2725769. The reversal of 2725721 is 1275272.

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 2725721 - 2¹⁰ = 2724697 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 (2725711) 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, 971 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (367500).

2^2725721 is an apocalyptic number.

It is an amenable number.

2725721 is a deficient number, since it is larger than the sum of its proper divisors (214279).

2725721 is a wasteful number, since it uses less digits than its factorization.

2725721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559.

The product of its digits is 1960, while the sum is 26.

The square root of 2725721 is about 1650.9757720815. The cubic root of 2725721 is about 139.6884398120.

The spelling of 2725721 in words is "two million, seven hundred twenty-five thousand, seven hundred twenty-one".