6870621 has 4 divisors (see below), whose sum is σ = 9160832. Its totient is φ = 4580412.

The previous prime is 6870559. The next prime is 6870653. The reversal of 6870621 is 1260786.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6870621 - 2¹⁷ = 6739549 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6870691) 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, 1145101 + ... + 1145106.

It is an arithmetic number, because the mean of its divisors is an integer number (2290208).

Almost surely, 2^6870621 is an apocalyptic number.

It is an amenable number.

6870621 is a deficient number, since it is larger than the sum of its proper divisors (2290211).

6870621 is a wasteful number, since it uses less digits than its factorization.

6870621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290210.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 6870621 is about 2621.1869448782. The cubic root of 6870621 is about 190.1072432422.

The spelling of 6870621 in words is "six million, eight hundred seventy thousand, six hundred twenty-one".