6501491 has 2 divisors, whose sum is σ = 6501492. Its totient is φ = 6501490.

The previous prime is 6501487. The next prime is 6501533. The reversal of 6501491 is 1941056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6501491 - 2² = 6501487 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6501491.

It is not a weakly prime, because it can be changed into another prime (6501421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250745 + 3250746.

It is an arithmetic number, because the mean of its divisors is an integer number (3250746).

Almost surely, 2^6501491 is an apocalyptic number.

6501491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6501491 is an equidigital number, since it uses as much as digits as its factorization.

6501491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 6501491 is about 2549.8021491873. The cubic root of 6501491 is about 186.6398264272.

The spelling of 6501491 in words is "six million, five hundred one thousand, four hundred ninety-one".