6247621 has 4 divisors (see below), whose sum is σ = 6400044. Its totient is φ = 6095200.

The previous prime is 6247613. The next prime is 6247667. The reversal of 6247621 is 1267426.

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 893025 + 5354596 = 945^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 6247621 - 2³ = 6247613 is a prime.

It is a Duffinian number.

6247621 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6247621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6247601) 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, 76150 + ... + 76231.

It is an arithmetic number, because the mean of its divisors is an integer number (1600011).

Almost surely, 2^6247621 is an apocalyptic number.

It is an amenable number.

6247621 is a deficient number, since it is larger than the sum of its proper divisors (152423).

6247621 is a wasteful number, since it uses less digits than its factorization.

6247621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152422.

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

The square root of 6247621 is about 2499.5241547143. The cubic root of 6247621 is about 184.1782004702.

The spelling of 6247621 in words is "six million, two hundred forty-seven thousand, six hundred twenty-one".