611961 has 24 divisors (see below), whose sum is σ = 995904. Its totient is φ = 332640.

The previous prime is 611957. The next prime is 611969. The reversal of 611961 is 169116.

It is not a de Polignac number, because 611961 - 2² = 611957 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 611961.

It is not an unprimeable number, because it can be changed into a prime (611969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3291 + ... + 3471.

It is an arithmetic number, because the mean of its divisors is an integer number (41496).

2⁶¹¹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

611961 is a deficient number, since it is larger than the sum of its proper divisors (383943).

611961 is a wasteful number, since it uses less digits than its factorization.

611961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 214 counting only the distinct ones).

The product of its digits is 324, while the sum is 24.

The square root of 611961 is about 782.2793618651. The cubic root of 611961 is about 84.9000439788.

The spelling of 611961 in words is "six hundred eleven thousand, nine hundred sixty-one".