11217045 has 32 divisors (see below), whose sum is σ = 20636928. Its totient is φ = 5096448.

The previous prime is 11217043. The next prime is 11217047. The reversal of 11217045 is 54071211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11217043) and next prime (11217047).

It is not a de Polignac number, because 11217045 - 2¹ = 11217043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33117 + ... + 33453.

It is an arithmetic number, because the mean of its divisors is an integer number (644904).

Almost surely, 2^11217045 is an apocalyptic number.

11217045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11217045 is a deficient number, since it is larger than the sum of its proper divisors (9419883).

11217045 is a wasteful number, since it uses less digits than its factorization.

11217045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11217045 is about 3349.1857219330. The cubic root of 11217045 is about 223.8512312027.

Adding to 11217045 its reverse (54071211), we get a palindrome (65288256).

The spelling of 11217045 in words is "eleven million, two hundred seventeen thousand, forty-five".