2646641 has 2 divisors, whose sum is σ = 2646642. Its totient is φ = 2646640.

The previous prime is 2646619. The next prime is 2646649. The reversal of 2646641 is 1466462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 38416 = 1615^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 2646641 - 2¹⁸ = 2384497 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (2646649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323320 + 1323321.

It is an arithmetic number, because the mean of its divisors is an integer number (1323321).

2^2646641 is an apocalyptic number.

It is an amenable number.

2646641 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646641 is an equidigital number, since it uses as much as digits as its factorization.

2646641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 2646641 is about 1626.8500238190. The cubic root of 2646641 is about 138.3242567552.

The spelling of 2646641 in words is "two million, six hundred forty-six thousand, six hundred forty-one".