1303730 has 16 divisors (see below), whose sum is σ = 2485080. Its totient is φ = 490752.

The previous prime is 1303711. The next prime is 1303739. The reversal of 1303730 is 373031.

It can be written as a sum of positive squares in 4 ways, for example, as 1301881 + 1849 = 1141^2 + 43^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1303699 and 1303708.

It is not an unprimeable number, because it can be changed into a prime (1303739) 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 7 ways as a sum of consecutive naturals, for example, 3665 + ... + 4004.

2^1303730 is an apocalyptic number.

1303730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1303730 is a deficient number, since it is larger than the sum of its proper divisors (1181350).

1303730 is a wasteful number, since it uses less digits than its factorization.

1303730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7693.

The product of its (nonzero) digits is 189, while the sum is 17.

The square root of 1303730 is about 1141.8099666757. The cubic root of 1303730 is about 109.2435705677.

Adding to 1303730 its reverse (373031), we get a palindrome (1676761).

The spelling of 1303730 in words is "one million, three hundred three thousand, seven hundred thirty".