2860721 has 2 divisors, whose sum is σ = 2860722. Its totient is φ = 2860720.

The previous prime is 2860691. The next prime is 2860723. The reversal of 2860721 is 1270682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2283121 + 577600 = 1511^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2860721 - 2⁶ = 2860657 is a prime.

Together with 2860723, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2860723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430360 + 1430361.

It is an arithmetic number, because the mean of its divisors is an integer number (1430361).

2^2860721 is an apocalyptic number.

It is an amenable number.

2860721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2860721 is an equidigital number, since it uses as much as digits as its factorization.

2860721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 2860721 is about 1691.3666072144. The cubic root of 2860721 is about 141.9575519489.

The spelling of 2860721 in words is "two million, eight hundred sixty thousand, seven hundred twenty-one".