10078505 has 4 divisors (see below), whose sum is σ = 12094212. Its totient is φ = 8062800.

The previous prime is 10078489. The next prime is 10078507. The reversal of 10078505 is 50587001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50587001 = 5153 ⋅9817.

It can be written as a sum of positive squares in 2 ways, for example, as 6615184 + 3463321 = 2572^2 + 1861^2 .

It is not a de Polignac number, because 10078505 - 2⁴ = 10078489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10078507) 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, 1007846 + ... + 1007855.

It is an arithmetic number, because the mean of its divisors is an integer number (3023553).

Almost surely, 2^10078505 is an apocalyptic number.

It is an amenable number.

10078505 is a deficient number, since it is larger than the sum of its proper divisors (2015707).

10078505 is an equidigital number, since it uses as much as digits as its factorization.

10078505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015706.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 10078505 is about 3174.6661241775. Note that the first 3 decimals coincide. The cubic root of 10078505 is about 216.0057797379.

The spelling of 10078505 in words is "ten million, seventy-eight thousand, five hundred five".