4148721 has 6 divisors (see below), whose sum is σ = 5992610. Its totient is φ = 2765808.

The previous prime is 4148719. The next prime is 4148741. The reversal of 4148721 is 1278414.

It can be written as a sum of positive squares in only one way, i.e., 3744225 + 404496 = 1935^2 + 636^2 .

It is not a de Polignac number, because 4148721 - 2¹ = 4148719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4148741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230476 + ... + 230493.

Almost surely, 2^4148721 is an apocalyptic number.

It is an amenable number.

4148721 is a deficient number, since it is larger than the sum of its proper divisors (1843889).

4148721 is a wasteful number, since it uses less digits than its factorization.

4148721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460975 (or 460972 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 4148721 is about 2036.8409363522. The cubic root of 4148721 is about 160.6835469677.

The spelling of 4148721 in words is "four million, one hundred forty-eight thousand, seven hundred twenty-one".