1443139 has 2 divisors, whose sum is σ = 1443140. Its totient is φ = 1443138.

The previous prime is 1443131. The next prime is 1443151. The reversal of 1443139 is 9313441.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9313441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1443139 - 2³ = 1443131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1443131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721569 + 721570.

It is an arithmetic number, because the mean of its divisors is an integer number (721570).

2^1443139 is an apocalyptic number.

1443139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1443139 is an equidigital number, since it uses as much as digits as its factorization.

1443139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 1443139 is about 1201.3072046733. The cubic root of 1443139 is about 113.0063170301.

The spelling of 1443139 in words is "one million, four hundred forty-three thousand, one hundred thirty-nine".