1331964 has 30 divisors (see below), whose sum is σ = 3482864. Its totient is φ = 443880.

The previous prime is 1331959. The next prime is 1331969. The reversal of 1331964 is 4691331.

It is an interprime number because it is at equal distance from previous prime (1331959) and next prime (1331969).

It is a Harshad number since it is a multiple of its sum of digits (27).

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

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 (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1732 + ... + 2379.

2^1331964 is an apocalyptic number.

It is an amenable number.

1331964 is an abundant number, since it is smaller than the sum of its proper divisors (2150900).

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

1331964 is a wasteful number, since it uses less digits than its factorization.

1331964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127 (or 4116 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1331964 is about 1154.1074473376. The cubic root of 1331964 is about 110.0265500651.

The spelling of 1331964 in words is "one million, three hundred thirty-one thousand, nine hundred sixty-four".