10620409 has 4 divisors (see below), whose sum is σ = 10986660. Its totient is φ = 10254160.

The previous prime is 10620397. The next prime is 10620439. The reversal of 10620409 is 90402601.

10620409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90402601 = 137 ⋅659873.

It can be written as a sum of positive squares in 2 ways, for example, as 8982009 + 1638400 = 2997^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 10620409 - 2⁹ = 10619897 is a prime.

It is a super-2 number, since 2×10620409² = 225586174654562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10620409.

It is not an unprimeable number, because it can be changed into a prime (10620439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183082 + ... + 183139.

It is an arithmetic number, because the mean of its divisors is an integer number (2746665).

Almost surely, 2^10620409 is an apocalyptic number.

It is an amenable number.

10620409 is a deficient number, since it is larger than the sum of its proper divisors (366251).

10620409 is an equidigital number, since it uses as much as digits as its factorization.

10620409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366250.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 10620409 is about 3258.8968992590. The cubic root of 10620409 is about 219.8098149756.

The spelling of 10620409 in words is "ten million, six hundred twenty thousand, four hundred nine".