1142539 has 2 divisors, whose sum is σ = 1142540. Its totient is φ = 1142538.

The previous prime is 1142509. The next prime is 1142549. The reversal of 1142539 is 9352411.

It is a strong prime.

It is an emirp because it is prime and its reverse (9352411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1142539 - 2⁵ = 1142507 is a prime.

1142539 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1142509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571269 + 571270.

It is an arithmetic number, because the mean of its divisors is an integer number (571270).

2^1142539 is an apocalyptic number.

1142539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1142539 is an equidigital number, since it uses as much as digits as its factorization.

1142539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 1142539 is about 1068.8961595964. The cubic root of 1142539 is about 104.5418892981.

It can be divided in two parts, 1142 and 539, that added together give a square (1681 = 41²).

The spelling of 1142539 in words is "one million, one hundred forty-two thousand, five hundred thirty-nine".