1331694 has 64 divisors (see below), whose sum is σ = 3655680. Its totient is φ = 349920.

The previous prime is 1331683. The next prime is 1331699. The reversal of 1331694 is 4961331.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331699) 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 31 ways as a sum of consecutive naturals, for example, 4779 + ... + 5049.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2^1331694 is an apocalyptic number.

1331694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827840).

1331694 is an abundant number, since it is smaller than the sum of its proper divisors (2323986).

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

1331694 is a wasteful number, since it uses less digits than its factorization.

1331694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 296 counting only the distinct ones).

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

The square root of 1331694 is about 1153.9904678982. The cubic root of 1331694 is about 110.0191151354.

It can be divided in two parts, 1331 and 694, that added together give a square (2025 = 45²).

The spelling of 1331694 in words is "one million, three hundred thirty-one thousand, six hundred ninety-four".