2145443 has 2 divisors, whose sum is σ = 2145444. Its totient is φ = 2145442.

The previous prime is 2145439. The next prime is 2145469. The reversal of 2145443 is 3445412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145443 - 2² = 2145439 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2145433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072721 + 1072722.

It is an arithmetic number, because the mean of its divisors is an integer number (1072722).

2^2145443 is an apocalyptic number.

2145443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145443 is an equidigital number, since it uses as much as digits as its factorization.

2145443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 23.

The square root of 2145443 is about 1464.7330814862. The cubic root of 2145443 is about 128.9750367336.

The spelling of 2145443 in words is "two million, one hundred forty-five thousand, four hundred forty-three".