2145839 has 2 divisors, whose sum is σ = 2145840. Its totient is φ = 2145838.

The previous prime is 2145827. The next prime is 2145853. The reversal of 2145839 is 9385412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145839 - 2⁴ = 2145823 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 (2145239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072919 + 1072920.

It is an arithmetic number, because the mean of its divisors is an integer number (1072920).

2^2145839 is an apocalyptic number.

2145839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145839 is an equidigital number, since it uses as much as digits as its factorization.

2145839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 2145839 is about 1464.8682534617. The cubic root of 2145839 is about 128.9829715319.

The spelling of 2145839 in words is "two million, one hundred forty-five thousand, eight hundred thirty-nine".