11891025 has 36 divisors (see below), whose sum is σ = 21834540. Its totient is φ = 6182400.

The previous prime is 11891021. The next prime is 11891053. The reversal of 11891025 is 52019811.

11891025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 762129 + 11128896 = 873^2 + 3336^2 .

It is not a de Polignac number, because 11891025 - 2² = 11891021 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11891025.

It is not an unprimeable number, because it can be changed into a prime (11891021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8581 + ... + 9869.

It is an arithmetic number, because the mean of its divisors is an integer number (606515).

Almost surely, 2^11891025 is an apocalyptic number.

11891025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11891025 is a deficient number, since it is larger than the sum of its proper divisors (9943515).

11891025 is a wasteful number, since it uses less digits than its factorization.

11891025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 11891025 is about 3448.3365555003. The cubic root of 11891025 is about 228.2477109244.

The spelling of 11891025 in words is "eleven million, eight hundred ninety-one thousand, twenty-five".