2645849 has 2 divisors, whose sum is σ = 2645850. Its totient is φ = 2645848.

The previous prime is 2645843. The next prime is 2645861. The reversal of 2645849 is 9485462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2560000 + 85849 = 1600^2 + 293^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645849 - 2¹⁶ = 2580313 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2645843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322924 + 1322925.

It is an arithmetic number, because the mean of its divisors is an integer number (1322925).

2^2645849 is an apocalyptic number.

It is an amenable number.

2645849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645849 is an equidigital number, since it uses as much as digits as its factorization.

2645849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 2645849 is about 1626.6065904207. The cubic root of 2645849 is about 138.3104576615.

The spelling of 2645849 in words is "two million, six hundred forty-five thousand, eight hundred forty-nine".