3025721 has 4 divisors (see below), whose sum is σ = 3057012. Its totient is φ = 2994432.

The previous prime is 3025709. The next prime is 3025739. The reversal of 3025721 is 1275203.

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 1428025 + 1597696 = 1195^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 3025721 - 2¹⁴ = 3009337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3025693 and 3025702.

It is not an unprimeable number, because it can be changed into a prime (3025741) 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, 15500 + ... + 15693.

It is an arithmetic number, because the mean of its divisors is an integer number (764253).

Almost surely, 2^3025721 is an apocalyptic number.

It is an amenable number.

3025721 is a deficient number, since it is larger than the sum of its proper divisors (31291).

3025721 is an equidigital number, since it uses as much as digits as its factorization.

3025721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31290.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 3025721 is about 1739.4599736700. The cubic root of 3025721 is about 144.6359635504.

The spelling of 3025721 in words is "three million, twenty-five thousand, seven hundred twenty-one".