1955859 has 8 divisors (see below), whose sum is σ = 2657232. Its totient is φ = 1279200.

The previous prime is 1955839. The next prime is 1955873. The reversal of 1955859 is 9585591.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1955859 - 2⁵ = 1955827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1955859.

It is not an unprimeable number, because it can be changed into a prime (1955809) 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 7 ways as a sum of consecutive naturals, for example, 5992 + ... + 6309.

It is an arithmetic number, because the mean of its divisors is an integer number (332154).

2^1955859 is an apocalyptic number.

1955859 is a deficient number, since it is larger than the sum of its proper divisors (701373).

1955859 is a wasteful number, since it uses less digits than its factorization.

1955859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12357.

The product of its digits is 81000, while the sum is 42.

The square root of 1955859 is about 1398.5202894488. The cubic root of 1955859 is about 125.0582981397.

The spelling of 1955859 in words is "one million, nine hundred fifty-five thousand, eight hundred fifty-nine".