9721436 has 6 divisors (see below), whose sum is σ = 17012520. Its totient is φ = 4860716.

The previous prime is 9721429. The next prime is 9721441. The reversal of 9721436 is 6341279.

It is a congruent 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 as a sum of consecutive naturals, namely, 1215176 + ... + 1215183.

It is an arithmetic number, because the mean of its divisors is an integer number (2835420).

Almost surely, 2^9721436 is an apocalyptic number.

It is an amenable number.

9721436 is a deficient number, since it is larger than the sum of its proper divisors (7291084).

9721436 is a wasteful number, since it uses less digits than its factorization.

9721436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430363 (or 2430361 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 9721436 is about 3117.9217437261. The cubic root of 9721436 is about 213.4241074202.

The spelling of 9721436 in words is "nine million, seven hundred twenty-one thousand, four hundred thirty-six".