1239943 has 2 divisors, whose sum is σ = 1239944. Its totient is φ = 1239942.

The previous prime is 1239923. The next prime is 1239961. The reversal of 1239943 is 3499321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1239943 - 2⁵ = 1239911 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619971 + 619972.

It is an arithmetic number, because the mean of its divisors is an integer number (619972).

2^1239943 is an apocalyptic number.

1239943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239943 is an equidigital number, since it uses as much as digits as its factorization.

1239943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 1239943 is about 1113.5272785163. The cubic root of 1239943 is about 107.4320609120.

The spelling of 1239943 in words is "one million, two hundred thirty-nine thousand, nine hundred forty-three".