1985137 has 24 divisors (see below), whose sum is σ = 2626560. Its totient is φ = 1481760.

The previous prime is 1985077. The next prime is 1985167. The reversal of 1985137 is 7315891.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1985137 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1985167) 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 23 ways as a sum of consecutive naturals, for example, 15568 + ... + 15694.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2^1985137 is an apocalyptic number.

It is an amenable number.

1985137 is a deficient number, since it is larger than the sum of its proper divisors (641423).

1985137 is a wasteful number, since it uses less digits than its factorization.

1985137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 174 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The square root of 1985137 is about 1408.9488990024. The cubic root of 1985137 is about 125.6792252066.

It can be divided in two parts, 198 and 5137, that added together give a palindrome (5335).

The spelling of 1985137 in words is "one million, nine hundred eighty-five thousand, one hundred thirty-seven".