1311948 has 36 divisors (see below), whose sum is σ = 3618888. Its totient is φ = 397440.

The previous prime is 1311923. The next prime is 1311967. The reversal of 1311948 is 8491131.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1261 + ... + 2052.

2^1311948 is an apocalyptic number.

1311948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1311948 is an abundant number, since it is smaller than the sum of its proper divisors (2306940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311948 is a wasteful number, since it uses less digits than its factorization.

1311948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334 (or 3329 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1311948 is about 1145.4029858526. The cubic root of 1311948 is about 109.4726271730.

The spelling of 1311948 in words is "one million, three hundred eleven thousand, nine hundred forty-eight".