1301720 has 32 divisors (see below), whose sum is σ = 3348000. Its totient is φ = 446208.

The previous prime is 1301719. The next prime is 1301761. The reversal of 1301720 is 271031.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1301695 and 1301704.

It is a congruent number.

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, 2045 + ... + 2604.

It is an arithmetic number, because the mean of its divisors is an integer number (104625).

2^1301720 is an apocalyptic number.

1301720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301720 is an abundant number, since it is smaller than the sum of its proper divisors (2046280).

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

1301720 is a wasteful number, since it uses less digits than its factorization.

1301720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 1301720 is about 1140.9294456714. The cubic root of 1301720 is about 109.1874003183.

Adding to 1301720 its reverse (271031), we get a palindrome (1572751).

The spelling of 1301720 in words is "one million, three hundred one thousand, seven hundred twenty".