1321698 has 16 divisors (see below), whose sum is σ = 3021120. Its totient is φ = 377616.

The previous prime is 1321693. The next prime is 1321711. The reversal of 1321698 is 8961231.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15693 + ... + 15776.

It is an arithmetic number, because the mean of its divisors is an integer number (188820).

2^1321698 is an apocalyptic number.

1321698 is an abundant number, since it is smaller than the sum of its proper divisors (1699422).

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

1321698 is a wasteful number, since it uses less digits than its factorization.

1321698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31481.

The product of its digits is 2592, while the sum is 30.

The square root of 1321698 is about 1149.6512514672. The cubic root of 1321698 is about 109.7431472658.

It can be divided in two parts, 132 and 1698, that added together give a triangular number (1830 = T₆₀).

The spelling of 1321698 in words is "one million, three hundred twenty-one thousand, six hundred ninety-eight".