1244539 has 4 divisors (see below), whose sum is σ = 1252624. Its totient is φ = 1236456.

The previous prime is 1244533. The next prime is 1244543. The reversal of 1244539 is 9354421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9354421 = 229 ⋅40849.

It is a cyclic number.

It is not a de Polignac number, because 1244539 - 2³ = 1244531 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1244531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3807 + ... + 4120.

It is an arithmetic number, because the mean of its divisors is an integer number (313156).

2^1244539 is an apocalyptic number.

1244539 is a deficient number, since it is larger than the sum of its proper divisors (8085).

1244539 is an equidigital number, since it uses as much as digits as its factorization.

1244539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084.

The product of its digits is 4320, while the sum is 28.

The square root of 1244539 is about 1115.5890820549. The cubic root of 1244539 is about 107.5646339274.

It can be divided in two parts, 12 and 44539, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 1244539 in words is "one million, two hundred forty-four thousand, five hundred thirty-nine".