6252721 has 4 divisors (see below), whose sum is σ = 6275572. Its totient is φ = 6229872.

The previous prime is 6252709. The next prime is 6252733. The reversal of 6252721 is 1272526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1272526 = 2 ⋅636263.

It is an interprime number because it is at equal distance from previous prime (6252709) and next prime (6252733).

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 5588496 = 815^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 6252721 - 2¹⁵ = 6219953 is a prime.

It is a super-3 number, since 3×6252721³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6252751) 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, 11010 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (1568893).

Almost surely, 2^6252721 is an apocalyptic number.

It is an amenable number.

6252721 is a deficient number, since it is larger than the sum of its proper divisors (22851).

6252721 is a wasteful number, since it uses less digits than its factorization.

6252721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22850.

The product of its digits is 1680, while the sum is 25.

The square root of 6252721 is about 2500.5441407822. The cubic root of 6252721 is about 184.2283023863.

The spelling of 6252721 in words is "six million, two hundred fifty-two thousand, seven hundred twenty-one".