11901225 has 24 divisors (see below), whose sum is σ = 22488640. Its totient is φ = 5440320.

The previous prime is 11901217. The next prime is 11901229. The reversal of 11901225 is 52210911.

11901225 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 11901225 - 2³ = 11901217 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (11901229) 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, 10810 + ... + 11859.

Almost surely, 2^11901225 is an apocalyptic number.

11901225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11901225 is a deficient number, since it is larger than the sum of its proper divisors (10587415).

11901225 is a wasteful number, since it uses less digits than its factorization.

11901225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22689 (or 22684 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 11901225 is about 3449.8152124425. The cubic root of 11901225 is about 228.3129551257.

It can be divided in two parts, 1190 and 1225, that added together give a triangular number (2415 = T₆₉).

The spelling of 11901225 in words is "eleven million, nine hundred one thousand, two hundred twenty-five".