1139287 has 2 divisors, whose sum is σ = 1139288. Its totient is φ = 1139286.

The previous prime is 1139273. The next prime is 1139291. The reversal of 1139287 is 7829311.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569643 + 569644.

It is an arithmetic number, because the mean of its divisors is an integer number (569644).

2^1139287 is an apocalyptic number.

1139287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139287 is an equidigital number, since it uses as much as digits as its factorization.

1139287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 1139287 is about 1067.3738801376. The cubic root of 1139287 is about 104.4426094525.

The spelling of 1139287 in words is "one million, one hundred thirty-nine thousand, two hundred eighty-seven".