6245721 has 8 divisors (see below), whose sum is σ = 9252960. Its totient is φ = 4163796.

The previous prime is 6245717. The next prime is 6245731. The reversal of 6245721 is 1275426.

It is not a de Polignac number, because 6245721 - 2² = 6245717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 231323 = 6245721 / (6 + 2 + 4 + 5 + 7 + 2 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6245731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115635 + ... + 115688.

It is an arithmetic number, because the mean of its divisors is an integer number (1156620).

Almost surely, 2^6245721 is an apocalyptic number.

It is an amenable number.

6245721 is a deficient number, since it is larger than the sum of its proper divisors (3007239).

6245721 is a wasteful number, since it uses less digits than its factorization.

6245721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231332 (or 231326 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 6245721 is about 2499.1440534711. The cubic root of 6245721 is about 184.1595280795.

The spelling of 6245721 in words is "six million, two hundred forty-five thousand, seven hundred twenty-one".