1321938 has 18 divisors (see below), whose sum is σ = 2874807. Its totient is φ = 439020.

The previous prime is 1321927. The next prime is 1321939. The reversal of 1321938 is 8391231.

It can be written as a sum of positive squares in only one way, i.e., 660969 + 660969 = 813^2 + 813^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=813.

It is not an unprimeable number, because it can be changed into a prime (1321939) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4743 + ... + 5013.

2^1321938 is an apocalyptic number.

1321938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1321938 is an abundant number, since it is smaller than the sum of its proper divisors (1552869).

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

1321938 is an equidigital number, since it uses as much as digits as its factorization.

1321938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 276 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1321938 is about 1149.7556262093. The cubic root of 1321938 is about 109.7497894188.

The spelling of 1321938 in words is "one million, three hundred twenty-one thousand, nine hundred thirty-eight".