1985530 has 8 divisors (see below), whose sum is σ = 3573972. Its totient is φ = 794208.

The previous prime is 1985513. The next prime is 1985537. The reversal of 1985530 is 355891.

It can be written as a sum of positive squares in 2 ways, for example, as 1896129 + 89401 = 1377^2 + 299^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1985492 and 1985501.

It is not an unprimeable number, because it can be changed into a prime (1985537) 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, 99267 + ... + 99286.

2^1985530 is an apocalyptic number.

1985530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1985530 is a deficient number, since it is larger than the sum of its proper divisors (1588442).

1985530 is a wasteful number, since it uses less digits than its factorization.

1985530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198560.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1985530 is about 1409.0883577690. The cubic root of 1985530 is about 125.6875182827.

The spelling of 1985530 in words is "one million, nine hundred eighty-five thousand, five hundred thirty".