891242 has 16 divisors (see below), whose sum is σ = 1544832. Its totient is φ = 381120.

The previous prime is 891239. The next prime is 891251. The reversal of 891242 is 242198.

It is an Ulam number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 818 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (96552).

2⁸⁹¹²⁴² is an apocalyptic number.

891242 is a deficient number, since it is larger than the sum of its proper divisors (653590).

891242 is a wasteful number, since it uses less digits than its factorization.

891242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413.

The product of its digits is 1152, while the sum is 26.

The square root of 891242 is about 944.0561423983. The cubic root of 891242 is about 96.2347409329.

It can be divided in two parts, 89 and 1242, that added together give a palindrome (1331).

The spelling of 891242 in words is "eight hundred ninety-one thousand, two hundred forty-two".