7211641 has 2 divisors, whose sum is σ = 7211642. Its totient is φ = 7211640.

The previous prime is 7211639. The next prime is 7211651. The reversal of 7211641 is 1461127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 29241 = 2680^2 + 171^2 .

It is an emirp because it is prime and its reverse (1461127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7211641 - 2¹ = 7211639 is a prime.

Together with 7211639, 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 (7211651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3605820 + 3605821.

It is an arithmetic number, because the mean of its divisors is an integer number (3605821).

Almost surely, 2^7211641 is an apocalyptic number.

It is an amenable number.

7211641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7211641 is an equidigital number, since it uses as much as digits as its factorization.

7211641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 7211641 is about 2685.4498692026. The cubic root of 7211641 is about 193.2018881260.

Adding to 7211641 its reverse (1461127), we get a palindrome (8672768).

The spelling of 7211641 in words is "seven million, two hundred eleven thousand, six hundred forty-one".