11671505 has 4 divisors (see below), whose sum is σ = 14005812. Its totient is φ = 9337200.

The previous prime is 11671493. The next prime is 11671507. The reversal of 11671505 is 50517611.

11671505 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.

It can be written as a sum of positive squares in 2 ways, for example, as 8862529 + 2808976 = 2977^2 + 1676^2 .

It is not a de Polignac number, because 11671505 - 2¹⁴ = 11655121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11671507) 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, 1167146 + ... + 1167155.

It is an arithmetic number, because the mean of its divisors is an integer number (3501453).

Almost surely, 2^11671505 is an apocalyptic number.

It is an amenable number.

11671505 is a deficient number, since it is larger than the sum of its proper divisors (2334307).

11671505 is an equidigital number, since it uses as much as digits as its factorization.

11671505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334306.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 11671505 is about 3416.3584413817. The cubic root of 11671505 is about 226.8344190231.

The spelling of 11671505 in words is "eleven million, six hundred seventy-one thousand, five hundred five".