6140521 has 2 divisors, whose sum is σ = 6140522. Its totient is φ = 6140520.

The previous prime is 6140473. The next prime is 6140531. The reversal of 6140521 is 1250416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5736025 + 404496 = 2395^2 + 636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6140521 is a prime.

6140521 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6140531) 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 as a sum of consecutive naturals, namely, 3070260 + 3070261.

It is an arithmetic number, because the mean of its divisors is an integer number (3070261).

Almost surely, 2^6140521 is an apocalyptic number.

It is an amenable number.

6140521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6140521 is an equidigital number, since it uses as much as digits as its factorization.

6140521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 6140521 is about 2478.0074656869. The cubic root of 6140521 is about 183.1197023088.

Adding to 6140521 its reverse (1250416), we get a palindrome (7390937).

The spelling of 6140521 in words is "six million, one hundred forty thousand, five hundred twenty-one".