6451261 has 2 divisors, whose sum is σ = 6451262. Its totient is φ = 6451260.

The previous prime is 6451259. The next prime is 6451271. The reversal of 6451261 is 1621546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3728761 + 2722500 = 1931^2 + 1650^2 .

It is a cyclic number.

It is not a de Polignac number, because 6451261 - 2¹ = 6451259 is a prime.

Together with 6451259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6451231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225630 + 3225631.

It is an arithmetic number, because the mean of its divisors is an integer number (3225631).

Almost surely, 2^6451261 is an apocalyptic number.

It is an amenable number.

6451261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6451261 is an equidigital number, since it uses as much as digits as its factorization.

6451261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 6451261 is about 2539.9332668399. The cubic root of 6451261 is about 186.1579284576.

The spelling of 6451261 in words is "six million, four hundred fifty-one thousand, two hundred sixty-one".