11781825 has 24 divisors (see below), whose sum is σ = 21251616. Its totient is φ = 5712000.

The previous prime is 11781787. The next prime is 11781827. The reversal of 11781825 is 52818711.

11781825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11781825 - 2⁶ = 11781761 is a prime.

It is a super-2 number, since 2×11781825² = 277622800661250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (11781827) 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, 6316 + ... + 7965.

It is an arithmetic number, because the mean of its divisors is an integer number (885484).

Almost surely, 2^11781825 is an apocalyptic number.

11781825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11781825 is a deficient number, since it is larger than the sum of its proper divisors (9469791).

11781825 is a wasteful number, since it uses less digits than its factorization.

11781825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305 (or 14300 counting only the distinct ones).

The product of its digits is 4480, while the sum is 33.

The square root of 11781825 is about 3432.4663144742. The cubic root of 11781825 is about 227.5468647163.

It can be divided in two parts, 1178 and 1825, that added together give a palindrome (3003).

The spelling of 11781825 in words is "eleven million, seven hundred eighty-one thousand, eight hundred twenty-five".