1303720 has 32 divisors (see below), whose sum is σ = 3201120. Its totient is φ = 473920.

The previous prime is 1303711. The next prime is 1303739. The reversal of 1303720 is 273031.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1303694 and 1303703.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1042 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (100035).

2^1303720 is an apocalyptic number.

1303720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303720 is an abundant number, since it is smaller than the sum of its proper divisors (1897400).

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

1303720 is a wasteful number, since it uses less digits than its factorization.

1303720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 1303720 is about 1141.8055876549. The cubic root of 1303720 is about 109.2432912567.

Adding to 1303720 its reverse (273031), we get a palindrome (1576751).

The spelling of 1303720 in words is "one million, three hundred three thousand, seven hundred twenty".