11821045 has 8 divisors (see below), whose sum is σ = 14289624. Its totient is φ = 9387264.

The previous prime is 11821031. The next prime is 11821081. The reversal of 11821045 is 54012811.

It can be written as a sum of positive squares in 4 ways, for example, as 49284 + 11771761 = 222^2 + 3431^2 .

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 11821045 - 2¹⁷ = 11689973 is a prime.

It is a Duffinian number.

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, 7944 + ... + 9313.

It is an arithmetic number, because the mean of its divisors is an integer number (1786203).

Almost surely, 2^11821045 is an apocalyptic number.

It is an amenable number.

11821045 is a deficient number, since it is larger than the sum of its proper divisors (2468579).

11821045 is a wasteful number, since it uses less digits than its factorization.

11821045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17399.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 11821045 is about 3438.1746610665. The cubic root of 11821045 is about 227.7990753215.

Adding to 11821045 its reverse (54012811), we get a palindrome (65833856).

The spelling of 11821045 in words is "eleven million, eight hundred twenty-one thousand, forty-five".