2145239 has 2 divisors, whose sum is σ = 2145240. Its totient is φ = 2145238.

The previous prime is 2145197. The next prime is 2145263. The reversal of 2145239 is 9325412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145239 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072619 + 1072620.

It is an arithmetic number, because the mean of its divisors is an integer number (1072620).

2^2145239 is an apocalyptic number.

2145239 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145239 is an equidigital number, since it uses as much as digits as its factorization.

2145239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 2145239 is about 1464.6634425697. The cubic root of 2145239 is about 128.9709487292.

The spelling of 2145239 in words is "two million, one hundred forty-five thousand, two hundred thirty-nine".