1311939 has 6 divisors (see below), whose sum is σ = 1895036. Its totient is φ = 874620.

The previous prime is 1311923. The next prime is 1311967. The reversal of 1311939 is 9391131.

It is not a de Polignac number, because 1311939 - 2⁴ = 1311923 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72877 + ... + 72894.

2^1311939 is an apocalyptic number.

1311939 is a deficient number, since it is larger than the sum of its proper divisors (583097).

1311939 is a wasteful number, since it uses less digits than its factorization.

1311939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145777 (or 145774 counting only the distinct ones).

The product of its digits is 729, while the sum is 27.

The square root of 1311939 is about 1145.3990570976. The cubic root of 1311939 is about 109.4723768440.

The spelling of 1311939 in words is "one million, three hundred eleven thousand, nine hundred thirty-nine".