1985071 has 8 divisors (see below), whose sum is σ = 2186064. Its totient is φ = 1787520.

The previous prime is 1985057. The next prime is 1985077. The reversal of 1985071 is 1705891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1985071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 2041.

It is an arithmetic number, because the mean of its divisors is an integer number (273258).

2^1985071 is an apocalyptic number.

1985071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1985071 is a deficient number, since it is larger than the sum of its proper divisors (200993).

1985071 is a wasteful number, since it uses less digits than its factorization.

1985071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1985071 is about 1408.9254770924. The cubic root of 1985071 is about 125.6778323690.

The spelling of 1985071 in words is "one million, nine hundred eighty-five thousand, seventy-one".