611859 has 4 divisors (see below), whose sum is σ = 815816. Its totient is φ = 407904.

The previous prime is 611839. The next prime is 611873. The reversal of 611859 is 958116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 611859 - 2⁵ = 611827 is a prime.

It is a D-number.

It is a Duffinian number.

611859 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (611839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101974 + ... + 101979.

It is an arithmetic number, because the mean of its divisors is an integer number (203954).

2⁶¹¹⁸⁵⁹ is an apocalyptic number.

611859 is a deficient number, since it is larger than the sum of its proper divisors (203957).

611859 is a wasteful number, since it uses less digits than its factorization.

611859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203956.

The product of its digits is 2160, while the sum is 30.

The square root of 611859 is about 782.2141650469. The cubic root of 611859 is about 84.8953267470.

The spelling of 611859 in words is "six hundred eleven thousand, eight hundred fifty-nine".