6721153 has 2 divisors, whose sum is σ = 6721154. Its totient is φ = 6721152.

The previous prime is 6721147. The next prime is 6721157. The reversal of 6721153 is 3511276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6697744 + 23409 = 2588^2 + 153^2 .

It is a cyclic number.

It is not a de Polignac number, because 6721153 - 2¹⁷ = 6590081 is a prime.

It is not a weakly prime, because it can be changed into another prime (6721157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360576 + 3360577.

It is an arithmetic number, because the mean of its divisors is an integer number (3360577).

Almost surely, 2^6721153 is an apocalyptic number.

It is an amenable number.

6721153 is a deficient number, since it is larger than the sum of its proper divisors (1).

6721153 is an equidigital number, since it uses as much as digits as its factorization.

6721153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 6721153 is about 2592.5186595278. The cubic root of 6721153 is about 188.7185512565.

The spelling of 6721153 in words is "six million, seven hundred twenty-one thousand, one hundred fifty-three".