6721436 has 6 divisors (see below), whose sum is σ = 11762520. Its totient is φ = 3360716.

The previous prime is 6721433. The next prime is 6721439. The reversal of 6721436 is 6341276.

It is an interprime number because it is at equal distance from previous prime (6721433) and next prime (6721439).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6721399 and 6721408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6721433) 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 as a sum of consecutive naturals, namely, 840176 + ... + 840183.

It is an arithmetic number, because the mean of its divisors is an integer number (1960420).

Almost surely, 2^6721436 is an apocalyptic number.

It is an amenable number.

6721436 is a deficient number, since it is larger than the sum of its proper divisors (5041084).

6721436 is a wasteful number, since it uses less digits than its factorization.

6721436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680363 (or 1680361 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 6721436 is about 2592.5732390812. The cubic root of 6721436 is about 188.7211999390.

The spelling of 6721436 in words is "six million, seven hundred twenty-one thousand, four hundred thirty-six".