10505720 has 16 divisors (see below), whose sum is σ = 23637960. Its totient is φ = 4202272.

The previous prime is 10505707. The next prime is 10505731. The reversal of 10505720 is 2750501.

It is a super-2 number, since 2×10505720² = 220740305436800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 10505692 and 10505701.

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, 131282 + ... + 131361.

Almost surely, 2^10505720 is an apocalyptic number.

10505720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10505720 is an abundant number, since it is smaller than the sum of its proper divisors (13132240).

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

10505720 is a wasteful number, since it uses less digits than its factorization.

10505720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262654 (or 262650 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 10505720 is about 3241.2528441947. The cubic root of 10505720 is about 219.0157130292.

The spelling of 10505720 in words is "ten million, five hundred five thousand, seven hundred twenty".