10001720 has 16 divisors (see below), whose sum is σ = 22503960. Its totient is φ = 4000672.

The previous prime is 10001713. The next prime is 10001759. The reversal of 10001720 is 2710001.

10001720 is nontrivially palindromic in base 9.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 124982 + ... + 125061.

Almost surely, 2^10001720 is an apocalyptic number.

10001720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001720 is an abundant number, since it is smaller than the sum of its proper divisors (12502240).

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

10001720 is a wasteful number, since it uses less digits than its factorization.

10001720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250054 (or 250050 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 10001720 is about 3162.5496043541. The cubic root of 10001720 is about 215.4558203873.

Adding to 10001720 its reverse (2710001), we get a palindrome (12711721).

The spelling of 10001720 in words is "ten million, one thousand, seven hundred twenty".