11394721 has 8 divisors (see below), whose sum is σ = 12325544. Its totient is φ = 10471680.

The previous prime is 11394707. The next prime is 11394749. The reversal of 11394721 is 12749311.

It can be written as a sum of positive squares in 4 ways, for example, as 4096 + 11390625 = 64^2 + 3375^2 .

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 11394721 - 2⁵ = 11394689 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 11394721.

It is not an unprimeable number, because it can be changed into a prime (11394781) 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, 1315 + ... + 4951.

It is an arithmetic number, because the mean of its divisors is an integer number (1540693).

Almost surely, 2^11394721 is an apocalyptic number.

It is an amenable number.

11394721 is a deficient number, since it is larger than the sum of its proper divisors (930823).

11394721 is a wasteful number, since it uses less digits than its factorization.

11394721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891.

The product of its digits is 1512, while the sum is 28.

The square root of 11394721 is about 3375.6067602729. The cubic root of 11394721 is about 225.0269663153.

The spelling of 11394721 in words is "eleven million, three hundred ninety-four thousand, seven hundred twenty-one".