6462721 has 4 divisors (see below), whose sum is σ = 6490692. Its totient is φ = 6434752.

The previous prime is 6462713. The next prime is 6462727. The reversal of 6462721 is 1272646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3610000 + 2852721 = 1900^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 6462721 - 2³ = 6462713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6462721.

It is not an unprimeable number, because it can be changed into a prime (6462727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13636 + ... + 14101.

It is an arithmetic number, because the mean of its divisors is an integer number (1622673).

Almost surely, 2^6462721 is an apocalyptic number.

It is an amenable number.

6462721 is a deficient number, since it is larger than the sum of its proper divisors (27971).

6462721 is a wasteful number, since it uses less digits than its factorization.

6462721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27970.

The product of its digits is 4032, while the sum is 28.

The square root of 6462721 is about 2542.1882306391. The cubic root of 6462721 is about 186.2680933731.

The spelling of 6462721 in words is "six million, four hundred sixty-two thousand, seven hundred twenty-one".