8921842 has 4 divisors (see below), whose sum is σ = 13382766. Its totient is φ = 4460920.

The previous prime is 8921837. The next prime is 8921863. The reversal of 8921842 is 2481298.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7123561 + 1798281 = 2669^2 + 1341^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 8³ + 9⁶ + 2⁹ + 1 + 8³ + 4⁴ + 2²³ .

It is a junction number, because it is equal to n+sod(n) for n = 8921798 and 8921807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2230459 + ... + 2230462.

Almost surely, 2^8921842 is an apocalyptic number.

8921842 is a deficient number, since it is larger than the sum of its proper divisors (4460924).

8921842 is a wasteful number, since it uses less digits than its factorization.

8921842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460923.

The product of its digits is 9216, while the sum is 34.

The square root of 8921842 is about 2986.9452623039. The cubic root of 8921842 is about 207.4045004970.

The spelling of 8921842 in words is "eight million, nine hundred twenty-one thousand, eight hundred forty-two".