11245781 has 4 divisors (see below), whose sum is σ = 11734752. Its totient is φ = 10756812.

The previous prime is 11245769. The next prime is 11245799. The reversal of 11245781 is 18754211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11245781 is a prime.

It is a super-3 number, since 3×11245781³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11245081) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 244451 + ... + 244496.

It is an arithmetic number, because the mean of its divisors is an integer number (2933688).

Almost surely, 2^11245781 is an apocalyptic number.

It is an amenable number.

11245781 is a deficient number, since it is larger than the sum of its proper divisors (488971).

11245781 is an equidigital number, since it uses as much as digits as its factorization.

11245781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488970.

The product of its digits is 2240, while the sum is 29.

The square root of 11245781 is about 3353.4729758863. The cubic root of 11245781 is about 224.0422233862.

Adding to 11245781 its reverse (18754211), we get a palindrome (29999992).

The spelling of 11245781 in words is "eleven million, two hundred forty-five thousand, seven hundred eighty-one".