11409525 has 24 divisors (see below), whose sum is σ = 20960960. Its totient is φ = 6084720.

The previous prime is 11409509. The next prime is 11409529. The reversal of 11409525 is 52590411.

11409525 is nontrivially palindromic in base 2.

11409525 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11409525 - 2⁴ = 11409509 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409529) 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, 7777 + ... + 9126.

Almost surely, 2^11409525 is an apocalyptic number.

11409525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11409525 is a deficient number, since it is larger than the sum of its proper divisors (9551435).

11409525 is a wasteful number, since it uses less digits than its factorization.

11409525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16922 (or 16911 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 11409525 is about 3377.7988394811. The cubic root of 11409525 is about 225.1243756793.

Adding to 11409525 its reverse (52590411), we get a palindrome (63999936).

The spelling of 11409525 in words is "eleven million, four hundred nine thousand, five hundred twenty-five".