2980721 has 2 divisors, whose sum is σ = 2980722. Its totient is φ = 2980720.

The previous prime is 2980711. The next prime is 2980723. The reversal of 2980721 is 1270892.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2190400 + 790321 = 1480^2 + 889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2980721 is a prime.

Together with 2980723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2980723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490360 + 1490361.

It is an arithmetic number, because the mean of its divisors is an integer number (1490361).

2^2980721 is an apocalyptic number.

It is an amenable number.

2980721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2980721 is an equidigital number, since it uses as much as digits as its factorization.

2980721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2980721 is about 1726.4764695761. The cubic root of 2980721 is about 143.9153469785.

The spelling of 2980721 in words is "two million, nine hundred eighty thousand, seven hundred twenty-one".