1331239 has 8 divisors (see below), whose sum is σ = 1638560. Its totient is φ = 1053216.

The previous prime is 1331227. The next prime is 1331243. The reversal of 1331239 is 9321331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331239 - 2⁵ = 1331207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7224 + ... + 7405.

It is an arithmetic number, because the mean of its divisors is an integer number (204820).

2^1331239 is an apocalyptic number.

1331239 is a deficient number, since it is larger than the sum of its proper divisors (307321).

1331239 is a wasteful number, since it uses less digits than its factorization.

1331239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14649.

The product of its digits is 486, while the sum is 22.

The square root of 1331239 is about 1153.7933090463. The cubic root of 1331239 is about 110.0065836280.

The spelling of 1331239 in words is "one million, three hundred thirty-one thousand, two hundred thirty-nine".