11145905 has 8 divisors (see below), whose sum is σ = 13396200. Its totient is φ = 8902656.

The previous prime is 11145899. The next prime is 11145907. The reversal of 11145905 is 50954111.

It can be written as a sum of positive squares in 4 ways, for example, as 43681 + 11102224 = 209^2 + 3332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11145905 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11145907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 5489.

It is an arithmetic number, because the mean of its divisors is an integer number (1674525).

Almost surely, 2^11145905 is an apocalyptic number.

It is an amenable number.

11145905 is a deficient number, since it is larger than the sum of its proper divisors (2250295).

11145905 is an equidigital number, since it uses as much as digits as its factorization.

11145905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 11145905 is about 3338.5483372268. The cubic root of 11145905 is about 223.3769957454.

The spelling of 11145905 in words is "eleven million, one hundred forty-five thousand, nine hundred five".