991485 has 24 divisors (see below), whose sum is σ = 1875744. Its totient is φ = 480480.

The previous prime is 991483. The next prime is 991493. The reversal of 991485 is 584199.

It is not a de Polignac number, because 991485 - 2¹ = 991483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991483) 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, 507 + ... + 1496.

It is an arithmetic number, because the mean of its divisors is an integer number (78156).

2⁹⁹¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

991485 is a deficient number, since it is larger than the sum of its proper divisors (884259).

991485 is a wasteful number, since it uses less digits than its factorization.

991485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025 (or 2022 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 991485 is about 995.7333980539. The cubic root of 991485 is about 99.7153572203.

It can be divided in two parts, 9914 and 85, that added together give a palindrome (9999).

The spelling of 991485 in words is "nine hundred ninety-one thousand, four hundred eighty-five".