1491239 has 2 divisors, whose sum is σ = 1491240. Its totient is φ = 1491238.

The previous prime is 1491233. The next prime is 1491241. The reversal of 1491239 is 9321941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491239 is a prime.

Together with 1491241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745619 + 745620.

It is an arithmetic number, because the mean of its divisors is an integer number (745620).

2^1491239 is an apocalyptic number.

1491239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491239 is an equidigital number, since it uses as much as digits as its factorization.

1491239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 1491239 is about 1221.1629702869. The cubic root of 1491239 is about 114.2481258082.

The spelling of 1491239 in words is "one million, four hundred ninety-one thousand, two hundred thirty-nine".