611641 has 2 divisors, whose sum is σ = 611642. Its totient is φ = 611640.

The previous prime is 611621. The next prime is 611657. The reversal of 611641 is 146116.

It is a happy number.

611641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 41616 = 755^2 + 204^2 .

It is a cyclic number.

It is not a de Polignac number, because 611641 - 2¹¹ = 609593 is a prime.

It is not a weakly prime, because it can be changed into another prime (611621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305820 + 305821.

It is an arithmetic number, because the mean of its divisors is an integer number (305821).

2⁶¹¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

611641 is a deficient number, since it is larger than the sum of its proper divisors (1).

611641 is an equidigital number, since it uses as much as digits as its factorization.

611641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

The square root of 611641 is about 782.0748046063. The cubic root of 611641 is about 84.8852430624.

Adding to 611641 its reverse (146116), we get a palindrome (757757).

The spelling of 611641 in words is "six hundred eleven thousand, six hundred forty-one".