10620561 has 16 divisors (see below), whose sum is σ = 16231424. Its totient is φ = 6051024.

The previous prime is 10620559. The next prime is 10620581. The reversal of 10620561 is 16502601.

It is a happy number.

It is not a de Polignac number, because 10620561 - 2¹ = 10620559 is a prime.

It is a super-2 number, since 2×10620561² = 225592631909442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10620521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10500 + ... + 11466.

It is an arithmetic number, because the mean of its divisors is an integer number (1014464).

Almost surely, 2^10620561 is an apocalyptic number.

It is an amenable number.

10620561 is a deficient number, since it is larger than the sum of its proper divisors (5610863).

10620561 is an equidigital number, since it uses as much as digits as its factorization.

10620561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 10620561 is about 3258.9202199502. The cubic root of 10620561 is about 219.8108636148.

The spelling of 10620561 in words is "ten million, six hundred twenty thousand, five hundred sixty-one".