11491405 has 8 divisors (see below), whose sum is σ = 14600952. Its totient is φ = 8652288.

The previous prime is 11491399. The next prime is 11491427. The reversal of 11491405 is 50419411.

It can be written as a sum of positive squares in 4 ways, for example, as 3884841 + 7606564 = 1971^2 + 2758^2 .

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 11491405 - 2³ = 11491397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11491405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67512 + ... + 67681.

It is an arithmetic number, because the mean of its divisors is an integer number (1825119).

Almost surely, 2^11491405 is an apocalyptic number.

It is an amenable number.

11491405 is a deficient number, since it is larger than the sum of its proper divisors (3109547).

11491405 is a wasteful number, since it uses less digits than its factorization.

11491405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135215.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 11491405 is about 3389.8974910755. The cubic root of 11491405 is about 225.6616245669.

It can be divided in two parts, 114 and 91405, that added together give a palindrome (91519).

The spelling of 11491405 in words is "eleven million, four hundred ninety-one thousand, four hundred five".