6753521 has 2 divisors, whose sum is σ = 6753522. Its totient is φ = 6753520.

The previous prime is 6753517. The next prime is 6753529. The reversal of 6753521 is 1253576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4145296 + 2608225 = 2036^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 6753521 - 2² = 6753517 is a prime.

It is a super-2 number, since 2×6753521² = 91220091794882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6753529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3376760 + 3376761.

It is an arithmetic number, because the mean of its divisors is an integer number (3376761).

Almost surely, 2^6753521 is an apocalyptic number.

It is an amenable number.

6753521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6753521 is an equidigital number, since it uses as much as digits as its factorization.

6753521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 29.

The square root of 6753521 is about 2598.7537397760. The cubic root of 6753521 is about 189.0210123797.

Subtracting from 6753521 its reverse (1253576), we obtain a palindrome (5499945).

The spelling of 6753521 in words is "six million, seven hundred fifty-three thousand, five hundred twenty-one".