11531005 has 8 divisors (see below), whose sum is σ = 14565600. Its totient is φ = 8739216.

The previous prime is 11530999. The next prime is 11531011. The reversal of 11531005 is 50013511.

11531005 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11530999) and next prime (11531011).

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

It is a cyclic number.

It is not a de Polignac number, because 11531005 - 2³ = 11530997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11531005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60595 + ... + 60784.

It is an arithmetic number, because the mean of its divisors is an integer number (1820700).

Almost surely, 2^11531005 is an apocalyptic number.

It is an amenable number.

11531005 is a deficient number, since it is larger than the sum of its proper divisors (3034595).

11531005 is a wasteful number, since it uses less digits than its factorization.

11531005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121403.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 11531005 is about 3395.7333523114. The cubic root of 11531005 is about 225.9205414143.

Adding to 11531005 its reverse (50013511), we get a palindrome (61544516).

The spelling of 11531005 in words is "eleven million, five hundred thirty-one thousand, five".