1985529 has 24 divisors (see below), whose sum is σ = 3319680. Its totient is φ = 1046304.

The previous prime is 1985513. The next prime is 1985537. The reversal of 1985529 is 9255891.

1985529 = 91² + 92² + ... + 188².

1985529 is nontrivially palindromic in base 9.

It is not a de Polignac number, because 1985529 - 2⁴ = 1985513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1985509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1392 + ... + 2430.

It is an arithmetic number, because the mean of its divisors is an integer number (138320).

2^1985529 is an apocalyptic number.

It is an amenable number.

1985529 is a deficient number, since it is larger than the sum of its proper divisors (1334151).

1985529 is a wasteful number, since it uses less digits than its factorization.

1985529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1062 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The square root of 1985529 is about 1409.0880029296. The cubic root of 1985529 is about 125.6874971821.

The spelling of 1985529 in words is "one million, nine hundred eighty-five thousand, five hundred twenty-nine".