1321073 has 6 divisors (see below), whose sum is σ = 1430694. Its totient is φ = 1219296.

The previous prime is 1321063. The next prime is 1321079. The reversal of 1321073 is 3701231.

It can be written as a sum of positive squares in 3 ways, for example, as 169744 + 1151329 = 412^2 + 1073^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1321073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3740 + ... + 4077.

It is an arithmetic number, because the mean of its divisors is an integer number (238449).

2^1321073 is an apocalyptic number.

1321073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1321073 is a deficient number, since it is larger than the sum of its proper divisors (109621).

1321073 is an equidigital number, since it uses as much as digits as its factorization.

1321073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7830 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1321073 is about 1149.3793977621. The cubic root of 1321073 is about 109.7258462178.

The spelling of 1321073 in words is "one million, three hundred twenty-one thousand, seventy-three".