991562 has 16 divisors (see below), whose sum is σ = 1747872. Its totient is φ = 415920.

The previous prime is 991547. The next prime is 991567. The reversal of 991562 is 265199.

It is not an unprimeable number, because it can be changed into a prime (991567) 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, 1448 + ... + 2019.

It is an arithmetic number, because the mean of its divisors is an integer number (109242).

2⁹⁹¹⁵⁶² is an apocalyptic number.

991562 is a deficient number, since it is larger than the sum of its proper divisors (756310).

991562 is a wasteful number, since it uses less digits than its factorization.

991562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493.

The product of its digits is 4860, while the sum is 32.

The square root of 991562 is about 995.7720622713. The cubic root of 991562 is about 99.7179384944.

It can be divided in two parts, 99 and 1562, that added together give a palindrome (1661).

The spelling of 991562 in words is "nine hundred ninety-one thousand, five hundred sixty-two".