1331967 has 48 divisors (see below), whose sum is σ = 2413152. Its totient is φ = 645120.

The previous prime is 1331959. The next prime is 1331969. The reversal of 1331967 is 7691331.

Together with 1081184 it forms a betrothed pair.

It is not a de Polignac number, because 1331967 - 2³ = 1331959 is a prime.

Its product of digits (3402) is a multiple of the sum of its prime divisors (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32467 + ... + 32507.

It is an arithmetic number, because the mean of its divisors is an integer number (50274).

2^1331967 is an apocalyptic number.

1331967 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1331967 is a deficient number, since it is larger than the sum of its proper divisors (1081185).

1331967 is a wasteful number, since it uses less digits than its factorization.

1331967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 81 counting only the distinct ones).

The product of its digits is 3402, while the sum is 30.

The square root of 1331967 is about 1154.1087470425. The cubic root of 1331967 is about 110.0266326698.

The spelling of 1331967 in words is "one million, three hundred thirty-one thousand, nine hundred sixty-seven".