4276721 has 2 divisors, whose sum is σ = 4276722. Its totient is φ = 4276720.

The previous prime is 4276693. The next prime is 4276739. The reversal of 4276721 is 1276724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2676496 + 1600225 = 1636^2 + 1265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4276721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4276421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2138360 + 2138361.

It is an arithmetic number, because the mean of its divisors is an integer number (2138361).

Almost surely, 2^4276721 is an apocalyptic number.

It is an amenable number.

4276721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4276721 is an equidigital number, since it uses as much as digits as its factorization.

4276721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 4276721 is about 2068.0234524782. The cubic root of 4276721 is about 162.3193542863.

The spelling of 4276721 in words is "four million, two hundred seventy-six thousand, seven hundred twenty-one".