11209725 has 24 divisors (see below), whose sum is σ = 20593920. Its totient is φ = 5978160.

The previous prime is 11209711. The next prime is 11209727. The reversal of 11209725 is 52790211.

It is not a de Polignac number, because 11209725 - 2¹⁸ = 10947581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (11209727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7629 + ... + 8978.

It is an arithmetic number, because the mean of its divisors is an integer number (858080).

Almost surely, 2^11209725 is an apocalyptic number.

11209725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11209725 is a deficient number, since it is larger than the sum of its proper divisors (9384195).

11209725 is a wasteful number, since it uses less digits than its factorization.

11209725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16626 (or 16615 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 11209725 is about 3348.0927406510. The cubic root of 11209725 is about 223.8025271225.

Adding to 11209725 its reverse (52790211), we get a palindrome (63999936).

The spelling of 11209725 in words is "eleven million, two hundred nine thousand, seven hundred twenty-five".