10405520 has 20 divisors (see below), whose sum is σ = 24193020. Its totient is φ = 4162176.

The previous prime is 10405501. The next prime is 10405523. The reversal of 10405520 is 2550401.

It can be written as a sum of positive squares in 2 ways, for example, as 6012304 + 4393216 = 2452^2 + 2096^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (10405523) by changing a digit.

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, 64955 + ... + 65114.

It is an arithmetic number, because the mean of its divisors is an integer number (1209651).

Almost surely, 2^10405520 is an apocalyptic number.

10405520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10405520 is an abundant number, since it is smaller than the sum of its proper divisors (13787500).

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

10405520 is a wasteful number, since it uses less digits than its factorization.

10405520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130082 (or 130076 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 10405520 is about 3225.7588254549. The cubic root of 10405520 is about 218.3171882991.

Adding to 10405520 its reverse (2550401), we get a palindrome (12955921).

The spelling of 10405520 in words is "ten million, four hundred five thousand, five hundred twenty".