4234721 has 2 divisors, whose sum is σ = 4234722. Its totient is φ = 4234720.

The previous prime is 4234697. The next prime is 4234723. The reversal of 4234721 is 1274324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 1221025 = 1736^2 + 1105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4234721 is a prime.

Together with 4234723, 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 (4234723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2117360 + 2117361.

It is an arithmetic number, because the mean of its divisors is an integer number (2117361).

Almost surely, 2^4234721 is an apocalyptic number.

It is an amenable number.

4234721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4234721 is an equidigital number, since it uses as much as digits as its factorization.

4234721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 4234721 is about 2057.8437744396. The cubic root of 4234721 is about 161.7862470695.

The spelling of 4234721 in words is "four million, two hundred thirty-four thousand, seven hundred twenty-one".