7921236 has 12 divisors (see below), whose sum is σ = 18482912. Its totient is φ = 2640408.

The previous prime is 7921229. The next prime is 7921237. The reversal of 7921236 is 6321297.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 7⁸ + 9 + 2³ + 1 + 2²¹ + 3¹⁰ + 6³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330040 + ... + 330063.

Almost surely, 2^7921236 is an apocalyptic number.

It is an amenable number.

7921236 is an abundant number, since it is smaller than the sum of its proper divisors (10561676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7921236 is a wasteful number, since it uses less digits than its factorization.

7921236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660110 (or 660108 counting only the distinct ones).

The product of its digits is 4536, while the sum is 30.

The square root of 7921236 is about 2814.4690440650. The cubic root of 7921236 is about 199.3414673872.

The spelling of 7921236 in words is "seven million, nine hundred twenty-one thousand, two hundred thirty-six".