1239081 has 4 divisors (see below), whose sum is σ = 1652112. Its totient is φ = 826052.

The previous prime is 1239067. The next prime is 1239089. The reversal of 1239081 is 1809321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1239081 is a prime.

It is a super-3 number, since 3×1239081³ = 5707163933372305323, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1239089) 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, 206511 + ... + 206516.

It is an arithmetic number, because the mean of its divisors is an integer number (413028).

2^1239081 is an apocalyptic number.

It is an amenable number.

1239081 is a deficient number, since it is larger than the sum of its proper divisors (413031).

1239081 is an equidigital number, since it uses as much as digits as its factorization.

1239081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413030.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1239081 is about 1113.1401529008. The cubic root of 1239081 is about 107.4071597930.

It can be divided in two parts, 12 and 39081, that added together give a palindrome (39093).

The spelling of 1239081 in words is "one million, two hundred thirty-nine thousand, eighty-one".