1720413 has 8 divisors (see below), whose sum is σ = 2548800. Its totient is φ = 1146924.

The previous prime is 1720399. The next prime is 1720421. The reversal of 1720413 is 3140271.

It is not a de Polignac number, because 1720413 - 2⁸ = 1720157 is a prime.

1720413 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31833 + ... + 31886.

It is an arithmetic number, because the mean of its divisors is an integer number (318600).

2^1720413 is an apocalyptic number.

It is an amenable number.

1720413 is a deficient number, since it is larger than the sum of its proper divisors (828387).

1720413 is an equidigital number, since it uses as much as digits as its factorization.

1720413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63728 (or 63722 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1720413 is about 1311.6451501835. The cubic root of 1720413 is about 119.8241173367.

Adding to 1720413 its reverse (3140271), we get a palindrome (4860684).

The spelling of 1720413 in words is "one million, seven hundred twenty thousand, four hundred thirteen".