2445991 has 2 divisors, whose sum is σ = 2445992. Its totient is φ = 2445990.

The previous prime is 2445979. The next prime is 2446009. The reversal of 2445991 is 1995442.

2445991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2445991 - 2¹⁵ = 2413223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2449991) 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, 1222995 + 1222996.

It is an arithmetic number, because the mean of its divisors is an integer number (1222996).

2^2445991 is an apocalyptic number.

2445991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2445991 is an equidigital number, since it uses as much as digits as its factorization.

2445991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 2445991 is about 1563.9664318648. The cubic root of 2445991 is about 134.7364037991.

The spelling of 2445991 in words is "two million, four hundred forty-five thousand, nine hundred ninety-one".