1985059 has 4 divisors (see below), whose sum is σ = 1999480. Its totient is φ = 1970640.

The previous prime is 1985057. The next prime is 1985077. The reversal of 1985059 is 9505891.

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

It is a cyclic number.

It is not a de Polignac number, because 1985059 - 2¹ = 1985057 is a prime.

It is a Duffinian number.

1985059 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1985051) 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, 7002 + ... + 7279.

It is an arithmetic number, because the mean of its divisors is an integer number (499870).

2^1985059 is an apocalyptic number.

1985059 is a deficient number, since it is larger than the sum of its proper divisors (14421).

1985059 is a wasteful number, since it uses less digits than its factorization.

1985059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14420.

The product of its (nonzero) digits is 16200, while the sum is 37.

The square root of 1985059 is about 1408.9212185215. The cubic root of 1985059 is about 125.6775791224.

It can be divided in two parts, 19 and 85059, that added together give a triangular number (85078 = T₄₁₂).

The spelling of 1985059 in words is "one million, nine hundred eighty-five thousand, fifty-nine".