2725421 has 4 divisors (see below), whose sum is σ = 2760000. Its totient is φ = 2690844.

The previous prime is 2725369. The next prime is 2725433. The reversal of 2725421 is 1245272.

It is a happy number.

2725421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2725421 - 2⁶ = 2725357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2725451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17171 + ... + 17328.

It is an arithmetic number, because the mean of its divisors is an integer number (690000).

2^2725421 is an apocalyptic number.

It is an amenable number.

2725421 is a deficient number, since it is larger than the sum of its proper divisors (34579).

2725421 is an equidigital number, since it uses as much as digits as its factorization.

2725421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34578.

The product of its digits is 1120, while the sum is 23.

The square root of 2725421 is about 1650.8849142202. The cubic root of 2725421 is about 139.6833147987.

The spelling of 2725421 in words is "two million, seven hundred twenty-five thousand, four hundred twenty-one".