1930321 has 12 divisors (see below), whose sum is σ = 2090340. Its totient is φ = 1781120.

The previous prime is 1930309. The next prime is 1930349. The reversal of 1930321 is 1230391.

It can be written as a sum of positive squares in 2 ways, for example, as 211600 + 1718721 = 460^2 + 1311^2 .

It is not a de Polignac number, because 1930321 - 2⁵ = 1930289 is a prime.

It is a super-2 number, since 2×1930321² = 7452278326082, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1930301) 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 11 ways as a sum of consecutive naturals, for example, 21645 + ... + 21733.

It is an arithmetic number, because the mean of its divisors is an integer number (174195).

2^1930321 is an apocalyptic number.

It is an amenable number.

1930321 is a deficient number, since it is larger than the sum of its proper divisors (160019).

1930321 is an equidigital number, since it uses as much as digits as its factorization.

1930321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1930321 is about 1389.3599245696. The cubic root of 1930321 is about 124.5116089453.

The spelling of 1930321 in words is "one million, nine hundred thirty thousand, three hundred twenty-one".