3055721 has 2 divisors, whose sum is σ = 3055722. Its totient is φ = 3055720.

The previous prime is 3055693. The next prime is 3055727. The reversal of 3055721 is 1275503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 42025 = 1736^2 + 205^2 .

It is an emirp because it is prime and its reverse (1275503) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3055721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3055727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1527860 + 1527861.

It is an arithmetic number, because the mean of its divisors is an integer number (1527861).

Almost surely, 2^3055721 is an apocalyptic number.

It is an amenable number.

3055721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3055721 is an equidigital number, since it uses as much as digits as its factorization.

3055721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 3055721 is about 1748.0620698362. The cubic root of 3055721 is about 145.1124138176.

The spelling of 3055721 in words is "three million, fifty-five thousand, seven hundred twenty-one".